Malicious PDF — malware analysis report

Static analysis result for SHA-256 164739ad4dc6962b…

MALICIOUS

PDF

75.3 KB Created: 2021-02-28 08:04:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: ad24244b75dc14215da5c3faf502b7cd SHA-1: c6650edb03c067bbe642e2bf382cbc48eb8bd48e SHA-256: 164739ad4dc6962bcfc1c29221c93e51e16eca63fa4c3595f8606813baf6d9c8
124 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one specifically pointing to a URL containing 'dyson+dc41+animal+repair+manual', suggesting a lure for users searching for technical information. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the PDF structure itself is designed to host and present these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9765

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 https://pelibifir.ru/strik?utm_term=dyson+dc41+animal+repair+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4483097/normal_60232dff09203.pdfIn PDF document text
    • http://instasale.company/jaybird_x4_vs_tarahazal4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426551/normal_5fe95514b8c10.pdfIn PDF document text
    • https://xamivozafuju.weebly.com/uploads/1/3/5/3/135308546/7998306.pdfIn PDF document text
    • https://cdn.sqhk.co/vasegodesazu/cVKzihD/15366241479.pdfIn PDF document text
    • https://geligike.weebly.com/uploads/1/3/4/5/134590657/mevobeki_wotegojipu_wiforemu_rugarerifu.pdfIn PDF document text
    • https://cdn.sqhk.co/furafurume/Nliche9/71201841202.pdfIn PDF document text
    • http://idealica-italiauficiale.website/kemper_profiler_stage_vs_helixhvaqt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481662/normal_5fc763688e481.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sojuwumupipijo.rf.gd/what_games_support_3d_audio_ps5.pdfIn PDF document text
    • http://wovutemikinodow.rf.gd/birds_of_paradise_font_free.pdfIn PDF document text
    • http://wadekazu.epizy.com/cfp_course_books.pdfIn PDF document text
    • http://zavedofidime.rf.gd/49436598036.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f914.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF914 5260 bytes
SHA-256: c5deb5a48cb94ae46dfcf0de14e8216f5efd5d06a5e7c93b5e71d342df1d4037
font_01_sfnt_off00010ae7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE7 10980 bytes
SHA-256: 6c3045bd8bcf1ab214de0ccd24dca22ad59e1598058ab53b9821db3b852356dc

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