Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcbd334fee48d1bc…

MALICIOUS

PDF

52.6 KB Created: 2021-02-24 04:49:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 61e66a19bcda8140900c82a4ad376827 SHA-1: 58d60355b80ac12102b403640f3d7b73886b9e94 SHA-256: dcbd334fee48d1bc131b2ce6340bab8320bf6f9e87946c9aff3df6a825daaa28
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many pointing to disposable domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it is designed to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7362

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://maypoin.ru/strik?utm_term=3+metros+sobre+el+cielo+resumen PDF link annotation
    • https://cdn.sqhk.co/dibitarebizu/Fdq7Rij/action_hero_biju_amazon_prime.pdfIn PDF document text
    • https://rovepegolotiru.weebly.com/uploads/1/3/4/3/134319415/c3e8237bc7.pdfIn PDF document text
    • https://xiligori.weebly.com/uploads/1/3/1/4/131411896/xilesepidavo.pdfIn PDF document text
    • https://zetaxufonepijak.weebly.com/uploads/1/3/4/3/134353616/wiluririlosuso.pdfIn PDF document text
    • https://manedubel.weebly.com/uploads/1/3/4/5/134587872/3532326.pdfIn PDF document text
    • https://tapebosipufadiz.weebly.com/uploads/1/3/4/3/134366988/fefodirikurepur.pdfIn PDF document text
    • https://cdn.sqhk.co/lizasizova/hg8hbtW/kaiser_permanente_washington_state_locations.pdfIn PDF document text
    • https://vojimefijizudi.weebly.com/uploads/1/3/4/3/134310580/bodad.pdfIn PDF document text
    • https://kixixowagixu.weebly.com/uploads/1/3/2/7/132710794/lavade.pdfIn PDF document text
    • https://didejigoximatex.weebly.com/uploads/1/3/1/0/131070501/48c888b1beea8a9.pdfIn PDF document text
    • https://cdn.sqhk.co/wexazaruko/1VEyiYU/chicken_cross_the_road_meme.pdfIn PDF document text
    • https://cdn.sqhk.co/zagawodijimo/mYfifYp/the_crossing_dead_characters.pdfIn PDF document text
    • https://kutawujotin.weebly.com/uploads/1/3/4/0/134016956/wovadudikod_porilerenev_dezelovo_ranuvakenidajej.pdfIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/mod_galacticraft_1._12_2.pdfIn PDF document text
    • http://fosekor.epizy.com/85585398860.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/xoxalizemudelevupazatineg.pdfIn PDF document text
    • http://jokipuzovorije.epizy.com/digovolezeni.pdfIn PDF document text

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