Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd05d9d61ad9f98f…

MALICIOUS

PDF

53.1 KB Created: 2021-04-12 21:21:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 757ddb7ee25a795c00e44f74dca3ca86 SHA-1: bd7d49417c360e75aa0fbbc5f1f20b76d3390905 SHA-256: cd05d9d61ad9f98fb2d9124d8cc4beed2cdae520f57a094966d696ee5ad90181
94 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, many of which are hosted on seemingly legitimate domains but are structured as link farms, suggesting an attempt to obscure malicious destinations. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating a tactic to distribute links across multiple domains. While no scripts were explicitly extracted, the presence of embedded URIs and the overall structure point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4696

Heuristics 4

  • 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 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 http://www.guninetwork.org/system/files/webform/heirri_proposals/35039450578.pdf
    • https://ambrose.edu/sites/default/files/webform/bunovodedodasu.pdf
    • https://ambrose.edu/sites/default/files/webform/54125375098.pdf
    • https://www.pharoxglobal.com/sites/default/files/webform/27804174203.pdf
    • https://vectorcorp.net/sites/default/files/webform/resume/tefofavokalozigukar.pdf
    • https://www.natsihwa.org.au/sites/default/files/webform/tesogiruzan.pdf
    • https://grossenbacher.co.nz/en/system/files/avoidance-training-certificates/tatemomolefifepa.pdf
    • http://cicatsalud.com/html/sites/default/files/webform/93477879009.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=star+wars+revenge+of+the+sith+download
    • https://www.ice.cam.ac.uk/sites/www.ice.cam.ac.uk/files/webform/10713621665.pdf
    • https://lib.asu.edu/system/files/webform/90369837207.pdf
    • https://campusrec.princeton.edu/system/files/webform/luzatebinibaxopititum.pdf

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