Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d8d5efde9884bf9…

MALICIOUS

PDF

126.3 KB Created: 2021-04-03 00:48:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: e12cf7c5571a426b7205496f782582f9 SHA-1: 59da759207131c958dbafb4d076d9f1aa83c9865 SHA-256: 9d8d5efde9884bf97eff3246b83cc7e4a46c5a86a2e602c27813e1fd630d9b67
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs, with one pointing to zajinet.ru, suggesting a phishing or malware distribution lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this by identifying the PDF as a link farm on disposable hosting, likely to obscure malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9753

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://zajinet.ru/award?keyword=naruto+shippuden+manga+1+pdf PDF link annotation
    • https://disumudumoronu.weebly.com/uploads/1/3/1/4/131408153/xejamibexujap-zapagefedi.pdfIn PDF document text
    • https://wodumipanopova.weebly.com/uploads/1/3/4/7/134731655/f02ba23.pdfIn PDF document text
    • https://sepolekabu.weebly.com/uploads/1/3/1/6/131606201/877381.pdfIn PDF document text
    • http://jajeredax.22web.org/metinalinigeru.pdfIn PDF document text
    • https://nuvomananakoleg.weebly.com/uploads/1/3/1/4/131453817/foroxumolijiki.pdfIn PDF document text
    • https://cdn.sqhk.co/mifijizudi/Mhdjjcx/head_soccer_champions_league_unblocked_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/vipabure/YvCgije/69715960345.pdfIn PDF document text
    • https://pugixodazujok.weebly.com/uploads/1/3/2/7/132710779/ba237846e45ee4.pdfIn PDF document text
    • http://maska-respirator.shop/flatness_tolerance_on_stainless_steel_sheetca502.pdfIn PDF document text
    • http://sodalabs.club/vyapar_crack_for_pczwz5x.pdfIn PDF document text
    • https://cdn.sqhk.co/vutexexukus/ihhfhfb/smyrna_first_umc_smyrna_ga.pdfIn PDF document text
    • http://naxadib.rf.gd/how_to_thread_a_singer_promise_1409_sewing_machine.pdfIn PDF document text
    • http://gufusogatodogej.rf.gd/5666091575.pdfIn PDF document text
    • http://wosoremozojofam.epizy.com/45685980433.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5c4e27f-cf76-48de-a62d-58d6ba40f8c2/lomirumoga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e159fb7-adee-4fa8-b1e1-722c3418be4c/navokexuledumulux.pdfIn PDF document text
    • http://gazadimo.rf.gd/aerobiosis_y_anaerobiosis.pdfIn PDF document text
    • http://pukevekoba.rf.gd/retirement_planning_worksheet_free.pdfIn PDF document text

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