Malicious PDF — malware analysis report

Static analysis result for SHA-256 c261165180fbda7a…

MALICIOUS

PDF

66.8 KB Created: 2021-03-29 12:14:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d63258f2cdd12252981e5706cdd589b SHA-1: 1d94a333152d03c8b3f225e306450f7503cdfe48 SHA-256: c261165180fbda7aeaacadbaf01694c0f691b28cb1a40e7ba1c44d7d6cc57205
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. The heuristic 'PDF_IMAGE_LURE' indicates it's an image-only document designed to trick users into clicking an embedded action. The presence of multiple external URIs, including one pointing to 'crophysi.ru', suggests a redirection to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6589

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 66 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://crophysi.ru/award?keyword=spinal+shock+vs+neurogenic+shock+pdf
    • http://tokio-2020.fun/wosomop93f81.pdf
    • https://cdn-cms.f-static.net/uploads/4529697/normal_6024f1f46709a.pdf
    • http://kinorio5.xyz/56565950662smb5y.pdf
    • https://static.s123-cdn-static.com/uploads/4388160/normal_5ff4d52aa7db3.pdf
    • https://cdn-cms.f-static.net/uploads/4385204/normal_6047d3156f6de.pdf
    • http://top-salez.site/videojet_manual_62100kte9.pdf
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    • https://static.s123-cdn-static.com/uploads/4380674/normal_5ff8adc5910c7.pdf
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    • http://openlait.pro/cuadernillo_de_lectoescritura_primer_grado_gratis0xagv.pdf
    • http://bibopasaxuvibu.mypressonline.com/biochemic_tissue_salts.pdf
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    • http://nukilaba.myartsonline.com/ampere_s_law_problems_and_solutions.pdf
    • http://kelegelevun.epizy.com/2817319162.pdf
    • http://ponenasese.epizy.com/crime_scene_report_example.pdf
    • http://pojozija.onlinewebshop.net/53094295752.pdf

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