Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae9d6d6ab22d78e5…

MALICIOUS

PDF

78.2 KB Created: 2021-03-15 05:45:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: bb556f8039b617866c079ffcb92ec52b SHA-1: bf46911ee73177e3378e90de0b014d8fdcdd434f SHA-256: ae9d6d6ab22d78e508dec5ab178f4958fc5e14f9fd61cce057c51d5748190c4d
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains an embedded JavaScript payload, which is a common technique for delivering malicious content. The embedded script likely attempts to redirect the user to a malicious URL, such as 'https://midufefew.ru/123?utm_term=10961c+automating+administration+with+windows+powershell+pdf', for further exploitation. The PDF also exhibits characteristics of a link farm, suggesting a broader campaign to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 7

  • 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.
  • 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://midufefew.ru/123?utm_term=10961c+automating+administration+with+windows+powershell+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382414/normal_5fd9aab3861b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452385/normal_601ad233c00ab.pdfIn PDF document text
    • http://vibolofisef.mywebcommunity.org/lonavatoxaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490529/normal_603b8f23559e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449781/normal_601512c946dfb.pdfIn PDF document text
    • http://sepoxudozixo.sportsontheweb.net/what_is_development_biology_embryonic.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416654/normal_602fdcc1ac0cd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/loneminovu/bokowumez.pdfIn PDF document text
    • https://36fc1fe3-b646-4cc1-b6e9-de51469aea27.filesusr.com/ugd/3eb4bd_3f6a520ae6764672b92317ace89ad875.pdf?index=trueIn PDF document text
    • https://8a5a474a-a671-4857-921d-d1df0ee72544.filesusr.com/ugd/523716_63399c6e900e4e2c9bd49978d5f184fc.pdf?index=trueIn PDF document text
    • https://b86313a8-447b-404d-ae6d-bc69740d899e.filesusr.com/ugd/e54fc7_67d360dcfa6c43e19f8d31489e74baa2.pdf?index=trueIn PDF document text
    • https://7fc1e5b2-1dd8-4457-9de2-3dea1ab9f589.filesusr.com/ugd/fedd61_cb80ee6884a142fc984d8a90add6355a.pdf?index=trueIn PDF document text
    • https://189c2d36-84ff-4b81-9465-96c33c1d3b91.filesusr.com/ugd/35ddae_2efc850d726441e9a38f46aa8bfcb1b7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/foneniz/nufaj.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/76289761790.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/gokizewe.pdfIn PDF document text
    • https://edefa294-c65c-46c5-840b-8a4669b9fdfe.filesusr.com/ugd/e4a001_c3c4232d364f4243b88d06c9e29901ff.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/731503053.pdfIn PDF document text
    • https://0a497e50-07dd-462d-832d-d8678f741a8e.filesusr.com/ugd/5f857b_86bf24d1ee4a47aaab17edcd8a91f6de.pdf?index=trueIn PDF document text
    • https://2386e270-bd20-42c1-b3e5-1ba7eaa1d68d.filesusr.com/ugd/b4f0c6_b0a4bf2d4ce74fd499fe7234e9811b71.pdf?index=trueIn PDF document text
    • https://0fdd9f25-8366-4660-9463-376fd915ad39.filesusr.com/ugd/c16cf9_892511b1b9204874892cff67bd9d6ea8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lopeteb/how_many_electrons_can_g_orbitals_hold.pdfIn PDF document text
    • https://s3.amazonaws.com/daniwodug/36387849087.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/aylesford_school_sports_college_ofsted_report.pdfIn PDF document text
    • https://28a90398-13b1-4b58-b54c-ed045a6bddf2.filesusr.com/ugd/7e9e1f_893e886271454906aac68f312dfaa0f5.pdf?index=trueIn 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_0001334a.bin pdf-embedded-script PDF raw stream script payload at offset 0x1334A 1669 bytes
SHA-256: 10d102c0ee23465deba641207aa2241705fdf750773166d5eab2114bd61ad9cb
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='PDFBox'>
<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>Bilemeha Mihayo</rdf:li>
   </rdf:Seq>
  </dc:creator>
  <dc:description>
   <rdf:Alt>
    <rdf:li xml:lang='x-default'>10961c automating administration with windows powershell pdf.      In this training course, you will gain the fundamental knowledge and skills to use Windows Powe</rdf:li>
   </rdf:Alt>
  </dc:description>
  <dc:subject>
   <rdf:Bag>
    <rdf:li>10961c automating administration with windows powershell pdf.      In this training course, you will gain the fundamental knowledge and skills to use Windows Powe</rdf:li>
   </rdf:Bag>
  </dc:subject>
  <dc:title>
   <rdf:Alt>
    <rdf:li xml:lang='x-default'>10961c automating administration with windows powershell pdf</rdf:li>
   </rdf:Alt>
  </dc:title>
 </rdf:Description>

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

 <rdf:Description rdf:about=''
  xmlns:xmp='http://ns.adobe.com/xap/1.0/'
  xmp:CreateDate='2020-08-01T00:46:34'
  xmp:CreatorTool='PDFBox'/>

 <rdf:Description rdf:about=''
  xmlns:xmpMM='http://ns.adobe.com/xap/1.0/mm/'
  xmpMM:DocumentID='f851fb80-3081-4ee2-981d-26e40c666d3d'
  xmpMM:InstanceID='fe0cd374-5d4c-4100-8be9-aecc13fc2b78'/>

 <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_off0000f2c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C2 6068 bytes
SHA-256: d4579a3a3fbc316f62c720b19cf0ef0c2537b6c77e94a878c45a2e81b7549e1c
font_01_sfnt_off00010750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10750 10428 bytes
SHA-256: c71d351b642019148cc59454fefb63a0a8d1b070488e504527692fb3eb3c1eeb

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