Malicious PDF — malware analysis report

Static analysis result for SHA-256 13953732bd99dd98…

MALICIOUS

PDF

84.2 KB Created: 2021-05-10 06:08:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 69fa57816342c8db66afffaa65cf7e06 SHA-1: 2018010d4b8c2ba00ac6dc5fcf4106bcd181367b SHA-256: 13953732bd99dd9852cd3a75384b6fce72977e47fab42bb18922a64da483b18a
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, identified as a link farm. Several heuristics indicate this is a SEO link farm on disposable hosting, likely intended to direct users to malicious sites. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent. No scripts were extracted, but the structure and link farm nature suggest a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8478

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/strik?utm_term=d%2526d+5e+werewolf+character PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459631/normal_6009c1856dca3.pdfIn PDF document text
    • https://piworanup.weebly.com/uploads/1/3/2/6/132681558/5856461.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367925/normal_602b0047c46bc.pdfIn PDF document text
    • https://kusafulidofet.weebly.com/uploads/1/3/4/0/134017607/kexetidiridotoditide.pdfIn PDF document text
    • https://cdn.sqhk.co/tutabalero/icijqpI/23671928950.pdfIn PDF document text
    • https://cdn.sqhk.co/tokarikadez/giIMhgR/knife_dash_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/jagugide/ziigjib/movie_night_decorations_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/zexetiminav/Vghijhd/betting_tips_free.pdfIn PDF document text
    • https://cdn.sqhk.co/rubogomuweme/biVuWiY/pudding_monster_4-_24_3_stars.pdfIn PDF document text
    • https://rixolojujosu.weebly.com/uploads/1/3/4/6/134622111/rijil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381102/normal_603a005b07e06.pdfIn PDF document text
    • https://pukuxenusafo.weebly.com/uploads/1/3/4/7/134711282/zawifakuxi.pdfIn PDF document text
    • https://depumubawaminuk.weebly.com/uploads/1/3/4/2/134236244/fugirabiwujiguleror.pdfIn PDF document text
    • https://69f7c7ec-f776-4f8b-90c4-e8126cd531e3.filesusr.com/ugd/772020_23ce09f0b22247b08d1d8bee4f736ee9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/97e323ed-7af1-4efa-8283-b303cf329ec1/nabisalenewap.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/fojimabuguwoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8550f8a3-0125-419e-b36c-f7af1d82b4e5/onkyo_tx-nr616_receiver.pdfIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/54673673927.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/60557946025.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2c5227f-8735-47e0-b2f1-c0124da52bf4/pedunafeliru.pdfIn PDF document text
    • https://d8acad56-eb9a-42d1-a06c-a695c5b02328.filesusr.com/ugd/0ad6c7_73bf268283fc4d0c8ea63d5ca802c655.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a95f41c0-104d-4b78-be39-7ee7afc7055f/8688419716.pdfIn PDF document text
    • https://9cf93ecd-64ee-4ad6-afcc-f350577a7522.filesusr.com/ugd/c4dbd3_2f0c99aad6f64ba0a8e8ade4be01942a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8ee3ba6-3428-4b9d-a333-0cce475d88e1/35836081945.pdfIn PDF document text

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