Malicious PDF — malware analysis report

Static analysis result for SHA-256 40fccc40cb7096ea…

MALICIOUS

PDF

54.2 KB Created: 2021-02-27 02:17:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 5ba9a3880278de397da3c05a4afe346e SHA-1: d1036cad1d661159aaf6199cde6206ebf07300e2 SHA-256: 40fccc40cb7096eadf58afd0c2b0ba10b4006cfb8f774b2e80944e6dd7c5827f
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, with heuristics indicating it functions as a link farm on disposable hosting. The embedded URLs and document body, though heavily obfuscated, suggest an attempt to redirect users to external sites. No scripts were extracted, but the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6565

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/strik?utm_term=easy+drum+sheet+music+for+beginners PDF link annotation
    • http://idealslim-italiaoficial.site/mibaseferemaporifosutyokj5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466135/normal_5fe21b974579b.pdfIn PDF document text
    • http://winovigamaj.mygamesonline.org/ingenuity_bouncer_seat_safety.pdfIn PDF document text
    • http://doordash.fun/68396419424cncup.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480744/normal_5ffeb713d2778.pdfIn PDF document text
    • https://cdn.sqhk.co/tuwebobit/ghB8h58/logo_quiz_level_302.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389604/normal_5fcf1534c8db8.pdfIn PDF document text
    • http://hotloveme.online/wimers3m03.pdfIn PDF document text
    • https://cdn.sqhk.co/nomuzali/fpBbgfs/44086025458.pdfIn PDF document text
    • https://cdn.sqhk.co/pofaxiniraz/ZbS3PM5/black_panther_animal_costume.pdfIn PDF document text
    • http://gakagebir.mypressonline.com/casio_fx_9860gii_vs_9750gii.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481156/normal_601affff8a11d.pdfIn PDF document text
    • http://tb-films.ru/89920865957l9jej.pdfIn PDF document text
    • http://triple-doska6.club/canon_pixma_mg3520_scanner88064.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/neponeremobojolubadutovef.pdfIn PDF document text
    • http://luturuwuxas.epizy.com/atomic_clock_radio_font_free.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/all_rounder_songs_320kbps.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/reporte_de_accidentes_laborales_arl_sura.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/88431004752.pdfIn PDF document text

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