Malicious PDF — malware analysis report

Static analysis result for SHA-256 92457f3d64b32004…

MALICIOUS

PDF

62.7 KB Created: 2021-03-15 18:01:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 81bed1e351e8258bc7cc3c89f58dd8ca SHA-1: 9c605876832e99a2b8c96b15fe09b43b0fd10b50 SHA-256: 92457f3d64b320043759e91b70f5e916b851b6c522fcb15789e0ae9e4130b90b
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The ClamAV detection and ML classifier indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and external links are indicative of an attempt to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5495

Heuristics 5

  • 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.
  • 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 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://bologen.ru/award?keyword=bmw+x1+preisliste+2020+pdf
    • http://sipataj.sportsontheweb.net/george_foreman_5-serving_classic_electric_indoor_grill_and_panini_press.pdf
    • http://bepifukikuku.mygamesonline.org/how_to_program_white_rodgers_thermostat_1f80-0471.pdf
    • https://jupavovol.weebly.com/uploads/1/3/4/3/134314217/c9ad2.pdf
    • https://jetukuzimol.weebly.com/uploads/1/3/2/6/132695660/kitivaw_menebavufu_dekigu.pdf
    • http://gepexoliv.medianewsonline.com/95590833493.pdf
    • http://kuzexamipapoxip.medianewsonline.com/zatuvapi.pdf
    • https://voruvagozi.weebly.com/uploads/1/3/4/7/134742827/tutipufure.pdf
    • https://cdn-cms.f-static.net/uploads/4372378/normal_604124b96ec5e.pdf
    • https://juwememuju.weebly.com/uploads/1/3/4/5/134523402/jadal-lexir-tuzurem.pdf
    • https://cdn-cms.f-static.net/uploads/4471946/normal_603fac4e4b297.pdf
    • https://static.s123-cdn-static.com/uploads/4421460/normal_6006b10bc23d1.pdf
    • https://dixapixukezawe.weebly.com/uploads/1/3/5/3/135388261/925a4ef90e6bd.pdf
    • https://gasatuba.weebly.com/uploads/1/3/4/5/134596028/9f11f4541.pdf
    • http://fosipuzo.mypressonline.com/97659328953.pdf
    • https://cdn-cms.f-static.net/uploads/4427519/normal_6027ed6db8402.pdf
    • https://bagugesi.weebly.com/uploads/1/3/0/7/130775983/3861687.pdf
    • http://pumorux.medianewsonline.com/dragon_age_asunder_free_download.pdf
    • https://jirewolekaza.weebly.com/uploads/1/3/4/3/134387643/nusanudajita_levagogadetuki_gamijamun.pdf
    • https://ritidajadufe.weebly.com/uploads/1/3/4/6/134622671/pafewawibil.pdf
    • http://malejubu.myartsonline.com/what_happened_at_the_end_of_the_story_the_veldt.pdf
    • http://ruvemad.myartsonline.com/49178141867.pdf
    • http://rofuvawitarul.atwebpages.com/bsc_maths_1st_year_books_free_download.pdf
    • https://56f9ebfc-1b58-4ccd-90b9-24793863e956.filesusr.com/ugd/0f3536_ce72bcd469da47b685ad34cc26f8d6e2.pdf?index=true
    • https://f2d828cf-06d9-46ea-85af-d88b0bc20d44.filesusr.com/ugd/501a20_1129205a6752488da464af5785d1d844.pdf?index=true
    • https://cb70cc59-2297-49c3-b7e2-2ac7e26e28d4.filesusr.com/ugd/4479ed_d86112560c2c473eb8983a2ae225ae9e.pdf?index=true

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