Malicious PDF — malware analysis report

Static analysis result for SHA-256 78ef817088385717…

MALICIOUS

PDF

41.6 KB Created: 2021-01-11 23:56:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: c2c30aa2a6c075c043b0218daa39dc11 SHA-1: 7fd893ff3bb4ea7a418afb942c74eb8de78209af SHA-256: 78ef81708838571700a43fcb35b21a6a6c48d68a16bbe4dd811794bec363cd28
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF document is identified as malicious by multiple heuristics and a machine learning classifier. It functions as a phishing lure, presenting minimal content and relying on a clickable link to redirect users to malicious infrastructure. The primary IOC is the malicious redirector URL, which is designed to lead victims to further malicious content or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8368

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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 41 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://ggtraff.ru/aws?utm_term=chief+information+officer+qualifications In PDF document text
    • https://cdn.sqhk.co/masunidupag/hihfvfz/dogemuwapofojimisoxozen.pdfIn PDF document text
    • https://cdn.sqhk.co/wixefawoz/IzJoge3/colony_brands_payment_specialist.pdfIn PDF document text
    • https://begagezegitajaj.weebly.com/uploads/1/3/1/3/131398046/bizipad-nikodipono-pefejepusu-modibugupe.pdfIn PDF document text
    • https://site-1177349.mozfiles.com/files/1177349/grand_truck_simulator_2_map_editor.pdfIn PDF document text
    • https://site-1177773.mozfiles.com/files/1177773/befiwetuvisu.pdfIn PDF document text
    • https://site-1167942.mozfiles.com/files/1167942/torasuk.pdfIn PDF document text
    • https://votadewigul.weebly.com/uploads/1/3/0/7/130775387/4077477.pdfIn PDF document text
    • https://site-1173463.mozfiles.com/files/1173463/rogodugakosivulifekovu.pdfIn PDF document text
    • https://site-1175829.mozfiles.com/files/1175829/33464103027.pdfIn PDF document text
    • https://nitonigizumori.weebly.com/uploads/1/3/0/7/130739712/wobeja.pdfIn PDF document text
    • https://site-1195801.mozfiles.com/files/1195801/zitelokisebadidozuxu.pdfIn PDF document text
    • https://site-1180295.mozfiles.com/files/1180295/midotepudusumibalado.pdfIn PDF document text
    • https://site-1168221.mozfiles.com/files/1168221/game_boy_advance_game_genie_codes.pdfIn PDF document text
    • https://cdn.sqhk.co/dofexoxev/fgjgjgj/94515557244.pdfIn PDF document text
    • https://site-1179415.mozfiles.com/files/1179415/english_worship_songs_in_french.pdfIn PDF document text

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