Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf9cdd2460b31c06…

MALICIOUS

PDF

88.3 KB Created: 2021-03-17 09:43:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c3dde5f1d65d7fb66bbfd496b3d300d SHA-1: d1e578c82d7e72c707236409e38be6febfbf6b67 SHA-256: cf9cdd2460b31c067d91b4c220462c4b9c9c2e120a3537a4b278e6fca357ae99
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains embedded URIs pointing to external websites, suggesting a phishing or credential harvesting attempt. The presence of these external links aligns with the Spearphishing Attachment technique, as the document likely serves as a lure to direct users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/award?keyword=sodium+fluoride+msds+pdf
    • https://vezinamitin.weebly.com/uploads/1/3/5/9/135984824/peduzemadodov.pdf
    • https://cdn-cms.f-static.net/uploads/4490725/normal_6035ae5ee9279.pdf
    • http://waystep.site/zusizegaxamasigorusilwtlp9.pdf
    • https://dugepenen.weebly.com/uploads/1/3/1/3/131379306/gizusotiliganew-gemetogi-xemaxodevinu.pdf
    • https://diritirafimiwav.weebly.com/uploads/1/3/4/3/134376035/ce9cf056d0ff4.pdf
    • http://nuloriwilorij.scienceontheweb.net/73290538294.pdf
    • http://jobs-ingenieur.best/2005_ford_focus_repair_manual_freezkjsc.pdf
    • http://martakkord.ru/938152252544crbb.pdf
    • http://geleostone.online/nedibuxovujipupilejomkz4x.pdf
    • http://winwites.space/absolute_monarchy_activity_worksheetu4qbq.pdf
    • https://bewokeramubi.weebly.com/uploads/1/3/1/6/131636949/6243798.pdf
    • https://xugowapowafav.weebly.com/uploads/1/3/0/7/130775127/8350596.pdf
    • https://cdn-cms.f-static.net/uploads/4371004/normal_6027804425893.pdf
    • https://cdn-cms.f-static.net/uploads/4402720/normal_600c0b1351f30.pdf
    • http://pochta-24.cc/jowoxez6cbg.pdf
    • https://static.s123-cdn-static.com/uploads/4393034/normal_5ff5bc1c15ff0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dotivaf/xeribabujusuzipagi.pdf
    • https://s3.amazonaws.com/jivagajamav/94542071562.pdf
    • https://s3.amazonaws.com/jeduzizonox/89048557130.pdf
    • http://kugukokoner.myartsonline.com/how_to_assemble_the_total_gym_fit.pdf
    • http://rewuwuja.onlinewebshop.net/18500770200.pdf
    • https://s3.amazonaws.com/folexapurilowe/latipofewa.pdf
    • http://futikuzita.onlinewebshop.net/87808097607.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011c8b.bin
e76cf8e4073a264ff3ff7d6988c3e0672774582bc27aebb66ad45122c62bd46b
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C8B 5080 bytes
font_01_sfnt_off00012dbc.bin
d2ed2d1efa8f94d83717ad7af5b87567e667adec89ed58f4e9c16c524e146538
pdf-font-stream PDF embedded font (sfnt) at offset 0x12DBC 11152 bytes