Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e9a314ab3a2ed1f…

MALICIOUS

PDF

51.8 KB Created: 2021-03-05 01:02:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd0c16c172a16d829347e2adcaf7edf1 SHA-1: 6de62911ffd9f5afaf4bb0ceda615735f85f585e SHA-256: 1e9a314ab3a2ed1fbfe03538d26090aefd3795a0a19ab8869dce84d3bc5244e6
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ClamAV and a machine learning classifier, exhibiting characteristics of a phishing lure. The PDF contains an image-only interface with a clickable action that redirects to an external URL, likely to download a second-stage payload or phish for credentials. The document body is heavily obfuscated and contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7391

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 51 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://baarspo.ru/strik?utm_term=briggs+and+stratton+675+series+lawn+mower+manual
    • https://cdn-cms.f-static.net/uploads/4378405/normal_604162f780ac3.pdf
    • https://cdn.sqhk.co/figegixo/hcugghj/lometinonil.pdf
    • https://lulegosepo.weebly.com/uploads/1/3/0/9/130969478/2328925.pdf
    • https://cdn-cms.f-static.net/uploads/4412762/normal_6016c4d2d657b.pdf
    • https://cdn-cms.f-static.net/uploads/4390068/normal_603079d237b12.pdf
    • https://cdn.sqhk.co/siripeka/fif1giK/16173963822.pdf
    • https://static.s123-cdn-static.com/uploads/4412591/normal_5fe4c01199f93.pdf
    • http://gemubanabugawa.mypressonline.com/favemoxobes.pdf
    • https://cdn-cms.f-static.net/uploads/4460042/normal_5fd8445cd53d6.pdf
    • https://cdn-cms.f-static.net/uploads/4408485/normal_5fe848ad744ca.pdf
    • http://kowojolajamuv.getenjoyment.net/how_to_write_a_bakery_business_proposal.pdf
    • https://cdn-cms.f-static.net/uploads/4449771/normal_5fe7dbebcabd7.pdf
    • https://cdn.sqhk.co/widafopaj/jdVA5dq/dududalaravajibifoki.pdf
    • https://cdn.sqhk.co/labifikup/diagfe6/13281259745.pdf
    • https://gidixelasulam.weebly.com/uploads/1/3/0/7/130739099/ede635493.pdf
    • https://uploads.strikinglycdn.com/files/dbd78b5d-dce8-404c-90b7-ff95782d1d2d/kefikegi.pdf
    • https://uploads.strikinglycdn.com/files/6197da39-626f-4e5f-9aed-8eabb13f4e3e/somutigemuzoxovevuvufew.pdf
    • http://kesolimasakifi.myartsonline.com/93142346924.pdf
    • https://uploads.strikinglycdn.com/files/04249930-728d-4fbe-8c62-1c1527f5c8b7/inkscape_gcode_tutorial.pdf

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