Malicious PDF — malware analysis report

Static analysis result for SHA-256 d73b65e21552970c…

MALICIOUS

PDF

58.2 KB Created: 2021-03-24 02:53:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 2a15a7fdd0455fe3b12f6f1306118b8d SHA-1: 0ba46c749ae1f2ad76cc5c6b5e6e22433fff9208 SHA-256: d73b65e21552970c43f02e457ce410ae050cc37074e11e8a926ff9b829462c98
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits characteristics of a link farm, likely intended for SEO manipulation or to host malicious content. It contains numerous external links, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to free PDF downloads, aligning with a phishing or malware distribution tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8917

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://leonvi.ru/award?keyword=pathfinder+bestiary+6+pdf+free+download PDF link annotation
    • http://gejopuzebizovuk.iblogger.org/from_enoch_to_the_dead_sea_scrolls.pdfIn PDF document text
    • https://legorigerelok.weebly.com/uploads/1/3/6/0/136056749/4699268.pdfIn PDF document text
    • http://zugawumaz.22web.org/salary_certificate_letter_format_sample.pdfIn PDF document text
    • https://duzopotubesafes.weebly.com/uploads/1/3/4/8/134890215/7528793.pdfIn PDF document text
    • https://womerakuketuzal.weebly.com/uploads/1/3/1/8/131856195/6476f7897df56.pdfIn PDF document text
    • http://jerigegunodew.iblogger.org/ncert_periodic_table_chapter.pdfIn PDF document text
    • http://kezatafoxab.epizy.com/27454256796.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f5b7715-a82e-48d4-9778-22d16335e749/examples_safety_hazards.pdfIn PDF document text
    • http://rabuxudizuxu.epizy.com/29755146259.pdfIn PDF document text
    • https://926da24b-d3df-4aea-ac1b-ebdf7359a9e7.filesusr.com/ugd/fef925_5f13883388fc48ac9d4e40539d027181.pdf?index=trueIn PDF document text
    • https://5c2df1de-05ea-4e17-9aa3-38adc7ce3153.filesusr.com/ugd/ddd609_4c284fb2a2674713986499e0521ebca1.pdf?index=trueIn PDF document text
    • http://temipaz.epizy.com/dupavitakitogoxilatiboji.pdfIn PDF document text
    • http://poxarow.epizy.com/panasonic_viera_universal_remote_not_working.pdfIn PDF document text
    • https://fea67d75-dd3b-4bdd-af05-748e92ec8a52.filesusr.com/ugd/05900a_610a01bc74f9437cb569ca7caa0b874f.pdf?index=trueIn PDF document text
    • http://titunika.rf.gd/bbc_live_lounge_covers.pdfIn PDF document text
    • https://217ba8a6-026c-4a9e-b1ce-2eadff0a4a08.filesusr.com/ugd/3d7af5_b16730753105413580011e7c68d7e0be.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c84817de-246b-424a-aa85-b4c65acf32ef/dark_souls_2_int_faith_weapons.pdfIn PDF document text
    • https://2c0370cf-43ec-4dc9-8589-ec1e7793a70d.filesusr.com/ugd/404058_f0f81516b32348ce825c6a7ca82f554a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8eefd71-1dff-4699-a5b2-bf4885e75f6b/bemuletukumuva.pdfIn PDF document text
    • https://679cd94f-bb1f-411a-9684-d99498fe93d6.filesusr.com/ugd/ce16d4_8bb410c0f450400e9ffb44f68e49636b.pdf?index=trueIn PDF document text

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