Malicious PDF — malware analysis report

Static analysis result for SHA-256 40df037535a2c93b…

MALICIOUS

PDF

175.9 KB Created: 2021-05-23 07:32:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 273c7e0af304b40e61b39c531167fda2 SHA-1: e3234f105715fbed498369cfbffdcc910a0853ba SHA-256: 40df037535a2c93ba5792bdd439de55e632fd8cc80cc614093da2c89cb19e564
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded URLs, with one specifically identified as a potential phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were extracted, the presence of a link farm on disposable hosting and the overall structure suggest the document is designed to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://jacksth.ru/strik?utm_term=can+you+watch+jurassic+world+fallen+kingdom+on+netflix PDF link annotation
    • https://xuzonikafu.weebly.com/uploads/1/3/5/3/135351414/bozexefesekuxap-gevonubiw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426062/normal_6056f0958891e.pdfIn PDF document text
    • https://sinujezujano.weebly.com/uploads/1/3/1/6/131606051/73b7f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414501/normal_606e095627aaa.pdfIn PDF document text
    • https://fipugodegiposal.weebly.com/uploads/1/3/4/6/134687615/ganavubitosal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426944/normal_5fdbddf1452ad.pdfIn PDF document text
    • https://xojovirasada.weebly.com/uploads/1/3/1/6/131637125/3696870.pdfIn PDF document text
    • https://xikematevi.weebly.com/uploads/1/3/4/3/134392378/6da348fd67.pdfIn PDF document text
    • https://fuzipoxo.weebly.com/uploads/1/3/0/8/130873840/1281795.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448535/normal_601e88b24ed7b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478968/normal_605b7d42ae5a0.pdfIn PDF document text
    • https://kogofidovobe.weebly.com/uploads/1/3/1/8/131871531/2176299.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/4f7adaf9-b371-4d6d-be5c-01897e059cd7/star_trek_enterprise_deck_plan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbe8c568-e8fe-494f-a417-c0bd0d651706/1069797497.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9a6e7da-bc87-440b-90ae-1f450a271734/best_certification_for_business_analytics.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/anaplastic_thyroid_cancer_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa918e23-0f99-45d6-a6fa-1175cff75dca/janarixaneto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aefe0aca-498d-42cb-831b-1916e1d6bd00/45010888948.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d96663f8-7598-475b-9893-7d86bd0e0aeb/nordictrack_folding_treadmill_how_to_unfold.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27fe2bc8-684a-4909-b86d-0427bfa3ad07/87100075637.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4d2b401-01d5-404d-a6ee-ba16266ae44c/zojirushi_bread_machine_manual_bb-hac10.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/zujer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd269339-2b5a-4185-8dee-b99c998ea83f/how_to_do_a_factory_reset_on_a_panasonic_viera_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79b4bd65-1aca-4590-8e74-d2d703403630/11723926539.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/reiner_and_bertholdt_transformation_music_lyrics.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00026100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26100 5744 bytes
SHA-256: a320a3e3413261bc6b6542ce1c74939f03d514e40530b77955698722d4b968b5
font_01_sfnt_off00027488.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27488 13816 bytes
SHA-256: 48bdaefbe14a81675957bd234fce4f5d33d0dce975b75b064a6002108d610e57
font_02_sfnt_off0002a138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A138 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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