Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cc4227fa625e085…

MALICIOUS

PDF

51.6 KB Created: 2021-02-23 20:05:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c86bd48a77a398c87c564a4ebe3a70b SHA-1: ede282e44139f7b823a808b85efd65e3acc4ce4f SHA-256: 2cc4227fa625e085b3a9ace2dc9741a72cf2a59fb40d8c5cdf48e4f415d7dca2
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an image-based lure and a malicious redirector link, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier further support its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6410

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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 51 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.
  • 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://yafferge.ru/strik?utm_term=american+english+idioms+pdf+free+download
    • https://cdn-cms.f-static.net/uploads/4467298/normal_602c012e8f976.pdf
    • https://bamutemo.weebly.com/uploads/1/3/2/6/132681362/6385031.pdf
    • http://jikovuruwigifan.iblogger.org/86734599112.pdf
    • https://nujetamewude.weebly.com/uploads/1/3/4/8/134881912/4135421.pdf
    • http://rubivof.22web.org/ar-15_manual.pdf
    • http://najefitisefema.epizy.com/wubakox.pdf
    • http://midugome.rf.gd/mes_english_classroom_worksheet.pdf
    • https://s3.amazonaws.com/xurixado/damelabijiponefutikidil.pdf
    • http://wetizizokixo.epizy.com/sonebovawurupasuwel.pdf
    • http://guvenaverelud.epizy.com/gewelirexevudovilubo.pdf
    • https://s3.amazonaws.com/tinajabizoreguf/following_directions_worksheet_ks2.pdf
    • https://s3.amazonaws.com/vuliwisuwig/lpc_licensure_exam_study_guides.pdf

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