Malicious PDF — malware analysis report

Static analysis result for SHA-256 6be5d229aebdaee6…

MALICIOUS

PDF

77.2 KB Created: 2021-03-14 04:09:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 1b969eb854db192ecfc51db7a7cfdb55 SHA-1: 9f2f8cecf4c6dd8d12e983c05057d8e30e75192f SHA-256: 6be5d229aebdaee6b8fba74ca04eb121e3ebaf8186e634503a2858687e222221
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are used in a link farm, a common tactic for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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
  • 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://ponafet.ru/strik?utm_term=asus+b85m-e%252Fcsm+drivers PDF link annotation
    • https://cdn.sqhk.co/fuwunikuneg/4jghdhj/87575745006.pdfIn PDF document text
    • http://poxumanavofeboz.scienceontheweb.net/81653776133.pdfIn PDF document text
    • https://cdn.sqhk.co/banuluwopote/igbbcFz/25088869692.pdfIn PDF document text
    • http://kawasus.scienceontheweb.net/zemarevufijoguk.pdfIn PDF document text
    • http://fufibubesex.iblogger.org/ovid_metamorphoses_book_1_translation.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368998/normal_601a6e3553a83.pdfIn PDF document text
    • http://lukiduxipapep.mywebcommunity.org/fundamentals_of_building_construction_free.pdfIn PDF document text
    • http://gukiduwonaxinef.getenjoyment.net/31239730265.pdfIn PDF document text
    • http://zajilakofudo.scienceontheweb.net/34147510442.pdfIn PDF document text
    • http://jisutuxoxaza.medianewsonline.com/7_definitions_of_leadership.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474739/normal_5ff93d0f93a97.pdfIn PDF document text
    • https://cdn.sqhk.co/mumesimasozo/AicAIjh/906623215.pdfIn PDF document text
    • https://cdn.sqhk.co/loganidob/ihivxsy/46292484453.pdfIn PDF document text
    • https://cdn.sqhk.co/pitekofotada/b1W6jeo/descargar_textra_sms_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445114/normal_5fef3436cc04c.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
    • http://junaken.onlinewebshop.net/parent_plus_master_promissory_note.pdfIn PDF document text
    • https://e82ff0bd-cb1a-4782-8b92-0a0fb7657660.filesusr.com/ugd/d17951_b33d0a7723934a0c917c2634cb6b19bc.pdf?index=trueIn PDF document text
    • http://pagumasobud.rf.gd/sepeb.pdfIn PDF document text
    • https://528f6e5c-6927-42ef-b7a5-a8f9c349750c.filesusr.com/ugd/07b979_ae33deba884e44088b87c0ab46145833.pdf?index=trueIn PDF document text
    • https://27420876-d215-4860-9a72-f48db0d0c320.filesusr.com/ugd/4062c2_0d4c1611fb7b4a2ebf3d2aec3b9b46bb.pdf?index=trueIn PDF document text
    • http://letutemoxeluz.onlinewebshop.net/me_before_you_streaming_vo_english_subtitles.pdfIn PDF document text
    • https://21c505bb-01ca-4817-a549-4ed1ebba5040.filesusr.com/ugd/7d7105_d2f9810d7f464f1881b8da8c856c13f2.pdf?index=trueIn 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_off0000e2a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A7 5004 bytes
SHA-256: a46e1ec3c6f9a4263a1664ecc957abbd36db28faacbb6cb32141de5ac6a4c425
font_01_sfnt_off0000f3bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3BB 11004 bytes
SHA-256: 823472c54b237014a0bd24623d6bcef96dd0e89f2a38936b9f872bf7fa9fb796
font_02_sfnt_off00011942.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11942 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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