Malicious PDF — malware analysis report

Static analysis result for SHA-256 bce5adc6dcb18942…

MALICIOUS

PDF

85.7 KB Created: 2021-09-18 01:10:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f43fa7ad18dbdec08dce96ead07eae89 SHA-1: 991c7b1ca5321c072d10f35ac9da1174ee11fef8 SHA-256: bce5adc6dcb1894273b9bb72d16cd6f9173a355fff2e346ffafe2a024f4400d7
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript payload that likely attempts to redirect the user to a malicious website, as indicated by the 'PDF_EMBEDDED_SCRIPT_PAYLOAD' and 'ML_NYX_PDF_MALICIOUS' heuristics. The document body and metadata suggest a lure related to installing software, specifically mentioning 'Install windows 10 video editor'. Several URLs extracted from the document point to compromised or disposable hosting, reinforcing the phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Embedded script payload in PDF stream high PDF_EMBEDDED_SCRIPT_PAYLOAD
    PDF stream bytes contain script execution markers such as ActiveXObject/CreateObject, WScript.Shell, PowerShell, or shell-exec primitives. This is stronger than ordinary PDF JavaScript because it indicates a staged external script payload hidden in stream bytes.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Suspicious extracted artifact medium EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://ibshospitals.com/userfiles/file/40664184711.pdf In PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/f7c3901a26e9c5051b782b754ca0f80d/gikarinasodenopopo.pdfIn PDF document text
    • http://moonlightmontessori.com/upload/files/xakobutawesagesofatagideb.pdfIn PDF document text
    • http://czernavendeghaz.hu/admin1/file/50245954547.pdfIn PDF document text
    • http://amidoux-peintures.com/ckfinder/userfiles/files/17430703399.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/8bf433eb5c65b0e634120a352e5fb7c7/25412948265.pdfIn PDF document text
    • http://dragonera.cn/admin/userfiles/file/xonegukirixari.pdfIn PDF document text
    • http://muzycznescyzoryki.pl/userfiles/file/1182984002.pdfIn PDF document text
    • http://jysfh.com/upload_fck/file/2021-9-17/20210917010523830175.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c2a8e017d5---liwifo.pdfIn PDF document text
    • http://jump360.co/upload/files/20210912050507.pdfIn PDF document text
    • https://xn--72ca1bzcdf9cg5df4n5a8cei.com/userfiles/files/binupixovumivuvosarosaw.pdfIn PDF document text
    • http://globalsublimation.net/uploadfile/files/78541741655.pdfIn PDF document text
    • http://www.solarwindependence.com/ckfinder/userfiles/files/kebade.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16145103dddce4---92932924188.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/161315063b9c26---82104564970.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16145057b9350a---69952428599.pdfIn PDF document text
    • http://cuanhuaabshanquoc.vn/files/22643472747.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/733842d0a5dbf611159da1e3200d332a/babixuraxasuwodojotir.pdfIn PDF document text
    • http://studiolegalebisantis.it/userfiles/files/53164221025.pdfIn PDF document text
    • http://hyunsin.net/userfiles/file/zupax.pdfIn PDF document text
    • http://eachfun.com/ckfinder/userfiles/site_eachfun_com/files/76824405007.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=install+windows+10+video+editorPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_pdf_script_00015184.bin pdf-embedded-script PDF raw stream script payload at offset 0x15184 1657 bytes
SHA-256: 2bf9f84fd9cb5b573b544b5a517eb4adc8d031b9f7390caef2e3c3f3d54f56e3
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 shell/COM execution token(s).
Preview script
First 1,000 lines of the extracted script
<?xpacket begin='' id='W5M0MpCehiHzreSzNTczkc9d'?>
<x:xmpmeta xmlns:x='adobe:ns:meta/' x:xmptk='Solid Converter PDF'>
<rdf:RDF xmlns:rdf='http://www.w3.org/1999/02/22-rdf-syntax-ns#'>

 <rdf:Description rdf:about=''
  xmlns:dc='http://purl.org/dc/elements/1.1/'
  dc:format='application/pdf'>
  <dc:creator>
   <rdf:Seq>
    <rdf:li>Vihiwahe Domako</rdf:li>
   </rdf:Seq>
  </dc:creator>
  <dc:description>
   <rdf:Alt>
    <rdf:li xml:lang='x-default'>Install windows 10 video editor. &lt;br&gt;&lt;center&gt;&lt;h2&gt;Install video editor windows 10 powershell. How to install shotcut video editor on w</rdf:li>
   </rdf:Alt>
  </dc:description>
  <dc:subject>
   <rdf:Bag>
    <rdf:li>Install windows 10 video editor. &lt;br&gt;&lt;center&gt;&lt;h2&gt;Install video editor windows 10 powershell. How to install shotcut video editor on w</rdf:li>
   </rdf:Bag>
  </dc:subject>
  <dc:title>
   <rdf:Alt>
    <rdf:li xml:lang='x-default'>Install windows 10 video editor</rdf:li>
   </rdf:Alt>
  </dc:title>
 </rdf:Description>

 <rdf:Description rdf:about=''
  xmlns:pdf='http://ns.adobe.com/pdf/1.3/'
  pdf:Producer='Solid Converter PDF'/>

 <rdf:Description rdf:about=''
  xmlns:xmp='http://ns.adobe.com/xap/1.0/'
  xmp:CreateDate='2020-03-23T09:20:04'
  xmp:CreatorTool='Solid Converter PDF'/>

 <rdf:Description rdf:about=''
  xmlns:xmpMM='http://ns.adobe.com/xap/1.0/mm/'
  xmpMM:DocumentID='eea24e4f-0f75-4771-a82d-15db5493df68'
  xmpMM:InstanceID='e27ee20f-a402-4c08-82d8-2a1fa3ece6b0'/>

 <rdf:Description rdf:about=''
  xmlns:xmpRights='http://ns.adobe.com/xap/1.0/rights/'
  xmpRights:Marked='True'/>
</rdf:RDF>
</x:xmpmeta>
<?xpacket end='w'?>
font_00_sfnt_off0000e912.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE912 18404 bytes
SHA-256: d0c5289b7b0aa1752abd33c023dfab22f9276b54ea7c27efe5fa5402655dea3e
font_01_sfnt_off0001189f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1189F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000130b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130B6 10516 bytes
SHA-256: ed1054f4cda8f4859274ce7105adf88be7e88bdc134faaaab36655d8a0f9075c

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