Malicious PDF — malware analysis report

Static analysis result for SHA-256 426fa6ead4b76f05…

MALICIOUS

PDF

68.3 KB Created: 2021-02-23 05:35:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: db573948209145ca1c40aff9422d8d12 SHA-1: 8681245bcee3924a997763f291a2db2065b7b56e SHA-256: 426fa6ead4b76f05834c31be9aab9ba75089f83d3b1cf80c2bc7cd0dd680218c
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with many pointing to disposable hosting and exhibiting link farm characteristics. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/strik?utm_term=kung+fu+panda+turtle+meme PDF link annotation
    • http://foyou.store/three_course_menu_templatevhzfi.pdfIn PDF document text
    • http://ihsteam.ru/good_drum_sets_for_beginners5idmn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447098/normal_5ff65f27125fe.pdfIn PDF document text
    • http://lalashoppen.online/39497807694wvltz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373986/normal_5fdbb799b3527.pdfIn PDF document text
    • https://cdn.sqhk.co/tadawatimi/ihahchb/famous_places_in_kabul_afghanistan.pdfIn PDF document text
    • https://jexafowasefuxuv.weebly.com/uploads/1/3/4/5/134588667/jajanepawikufo-xovarite-fijexumitiva-fozalezisemawul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483337/normal_601ff3ddb442b.pdfIn PDF document text
    • https://javesobasi.weebly.com/uploads/1/3/4/7/134736097/1992053.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407318/normal_5fc5780da95b8.pdfIn PDF document text
    • http://lestyprin.online/supersport_3_dstv_guidehrgyo.pdfIn PDF document text
    • https://tizelizenofus.weebly.com/uploads/1/3/0/7/130740364/c61f32ec9.pdfIn PDF document text
    • https://ranetaxute.weebly.com/uploads/1/3/4/8/134886021/fipajiwukux.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370062/normal_5feea514c1908.pdfIn PDF document text
    • https://juladuwupib.weebly.com/uploads/1/3/4/7/134763366/godepunoborazirejolu.pdfIn PDF document text
    • https://makirogu.weebly.com/uploads/1/3/0/9/130969002/likuton_binajopifidawif.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/yamaha_mg24_14fx.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/4_qul_sharif_in_arabic.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE0E 5152 bytes
SHA-256: 820d499b3cabc74a3a576b348b5a74c1802a26057d1791968bc698016eb975d2
font_01_sfnt_off0000df90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF90 10700 bytes
SHA-256: 5957366b978ad08b75bb9ab27a40e540cb45e91a626b25fb5d26ff2545bcdc26

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