Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e6d2c0d69c41d78…

MALICIOUS

PDF

66.3 KB Created: 2020-11-30 00:21:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: c6ab084da2268eed410804509306cc90 SHA-1: 67df58c0010bc4f0a62dc822f591f4c06230e82a SHA-256: 4e6d2c0d69c41d781d8f04455bdac83e05ba94c1e804c6e1f796bdea9a476542
256 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains an embedded JavaScript payload and multiple external links, suggesting it's designed to download and execute further malicious content. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' indicates the document actively tries to trick the user into running commands, likely to facilitate the execution of the embedded script or a downloaded payload. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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 https://trafftec.ru/strik?utm_term=learn+windows+powershell+in+a+month+of+lunches+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4390051/normal_5f962751d330a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386618/normal_5fa7041d86b17.pdfIn PDF document text
    • https://zilexewutefak.weebly.com/uploads/1/3/4/6/134608169/4606873.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365599/normal_5f87c9d02740b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384029/normal_5f982723525e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450250/normal_5fba810057abd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369930/normal_5f8a226cbb040.pdfIn PDF document text
    • https://kilekawu.weebly.com/uploads/1/3/4/8/134857711/zuwunufe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477400/normal_5fa6f4889dc88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484356/normal_5fbd39f39ff29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478393/normal_5fba862859637.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368978/normal_5fc3aa02bdc75.pdfIn PDF document text
    • https://kodopagedo.weebly.com/uploads/1/3/4/3/134350575/zajoxobuvi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365661/normal_5f877162f1750.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6c4f6d5-42d0-4585-b174-d6cd55b17016/75333542934.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d15e623-90a5-4913-bc39-0cd41c19cfed/manual_for_brother_ls2125i_sewing_machine.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_pdf_script_000103cd.bin pdf-embedded-script PDF raw stream script payload at offset 0x103CD 1660 bytes
SHA-256: a89f323f88f6d2cdb032a64771fae0461a5c5cf26412493bad4f368658ea628e
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 3 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='ImageMagick'>
<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>Cavegujoja Fohexayiho</rdf:li>
   </rdf:Seq>
  </dc:creator>
  <dc:description>
   <rdf:Alt>
    <rdf:li xml:lang='x-default'>Learn windows powershell in a month of lunches pdf. Page 2 Cannot perform this action at this time. Online using a different tab or window. Reload to up</rdf:li>
   </rdf:Alt>
  </dc:description>
  <dc:subject>
   <rdf:Bag>
    <rdf:li>Learn windows powershell in a month of lunches pdf. Page 2 Cannot perform this action at this time. Online using a different tab or window. Reload to up</rdf:li>
   </rdf:Bag>
  </dc:subject>
  <dc:title>
   <rdf:Alt>
    <rdf:li xml:lang='x-default'>Learn windows powershell in a month of lunches pdf</rdf:li>
   </rdf:Alt>
  </dc:title>
 </rdf:Description>

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

 <rdf:Description rdf:about=''
  xmlns:xmp='http://ns.adobe.com/xap/1.0/'
  xmp:CreateDate='2020-02-17T10:57:43'
  xmp:CreatorTool='ImageMagick'/>

 <rdf:Description rdf:about=''
  xmlns:xmpMM='http://ns.adobe.com/xap/1.0/mm/'
  xmpMM:DocumentID='5f8931e0-7c02-4eca-9a08-9e864f1736b2'
  xmpMM:InstanceID='2997fa48-fe14-45c9-9ebd-4e18533c6c36'/>

 <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_off0000c761.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC761 5428 bytes
SHA-256: 2cbe6fc77e7ebdd10340503596f5a3390782d144a4fbf46f0fdf7944a3d6c61d
font_01_sfnt_off0000d9c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C8 10100 bytes
SHA-256: 7eeb31cbb3450c53a1f43bb212a00ab22c09399c063886f24c76bc26b12554fd

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