Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c3d683121720b2a…

MALICIOUS

PDF

49.6 KB Created: 2021-03-01 01:50:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 75e61731a64abd8db37abb7765a26239 SHA-1: ddfbf9f58169170ee5de3a002b32045e985eb19b SHA-256: 4c3d683121720b2a6fe50ce3c69664ee12966c8d73dce2e1a6303e321b794fbf
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure with a full-page screenshot and a clickable action. It contains multiple external URIs, including one that appears to be a redirector on disposable hosting, suggesting an attempt to lead the user to a malicious site. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8783

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
  • 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 49 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.
  • 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://dugedepap.ru/aws?utm_term=is+ccna+security+hard
    • http://forkidsshop.online/safufepojawekosuzaftqspl.pdf
    • https://cdn.sqhk.co/sivofedexim/pl7Bkid/puzzle_joy_bubble_shooter_legend.pdf
    • https://cdn-cms.f-static.net/uploads/4458633/normal_603aab0e97996.pdf
    • http://vorakumezaxof.mygamesonline.org/21754130241.pdf
    • https://cdn.sqhk.co/gujadozede/ijYjahc/best_world_war_2_zombie_movies.pdf
    • https://cdn-cms.f-static.net/uploads/4463306/normal_5fdb9ea12b818.pdf
    • http://gejudoxe.mypressonline.com/blood_bowl_2_legendary_edition_star_players.pdf
    • https://cdn-cms.f-static.net/uploads/4427785/normal_602a98202771c.pdf
    • http://kifopelidito.mypressonline.com/what_does_space_mean_in_interior_design.pdf
    • https://static.s123-cdn-static.com/uploads/4467325/normal_5fe55535424c8.pdf
    • https://cdn-cms.f-static.net/uploads/4385197/normal_6025985ecdce6.pdf
    • https://cdn.sqhk.co/waxipefimafa/Ujimdic/12488295090.pdf
    • http://pimoxonevuwewax.atwebpages.com/19999488050.pdf
    • https://s3.amazonaws.com/retisovojor/transformar_foto_em_desenho_caricatura_online_gratis.pdf
    • https://s3.amazonaws.com/vedexajawo/48136142822.pdf
    • https://s3.amazonaws.com/navoburarovada/how_much_does_a_jeep_renegade_service_cost.pdf

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