Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a8ec98f02305df8…

MALICIOUS

PDF

75.4 KB Created: 2021-05-15 08:46:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 48e8bcbb6c69bfd6d817291f9db1c020 SHA-1: 059e2830d8f137fd6dc1735e0c6a14df85c968eb SHA-256: 8a8ec98f02305df8f1f971393e379349e332bf6814d9fa1fa7404198eeb19bf9
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://static.s123-cdn-static.com/uploads/4371272/normal_5fed32bd9a669.pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4381547/normal_605f5eb81ba60.pdfIn PDF document text
    • http://xilexevu.scienceontheweb.net/95749588174.pdfIn PDF document text
    • https://cdn.sqhk.co/fiseguvugele/gdhgphh/xbox_series_x_price_uk_pre_order.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484804/normal_5febd486a3089.pdfIn PDF document text
    • https://cdn.sqhk.co/nodujugebi/gqigijw/27928718336.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416501/normal_606e532aa17ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410975/normal_602a8a3aa2864.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444874/normal_604623567233d.pdfIn PDF document text
    • https://cdn.sqhk.co/letaziseb/YUSi8jb/91763107725.pdfIn PDF document text
    • http://texoraw.sportsontheweb.net/jegojerunemelirufume.pdfIn PDF document text
    • https://cdn.sqhk.co/bigulikexupa/fdjcepH/boost_flip_phones_at_walmart.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476275/normal_6017433c5a47b.pdfIn PDF document text
    • https://cdn.sqhk.co/befozaxulot/igjgZ7Y/wallpapers_for_iphone_x_4k.pdfIn PDF document text
    • http://mapugukabazewu.scienceontheweb.net/95014635618.pdfIn PDF document text
    • https://cdn.sqhk.co/zogobadakedu/cYLDqhg/yellow_jacket_sting_dog.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450732/normal_5fc9ce4141645.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461791/normal_6018d97c08388.pdfIn PDF document text
    • https://cdn.sqhk.co/nivunufozub/hcnu2v5/download_super_jabber_jump_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxeromewime/d7icUic/ultimate_viking_apk.pdfIn PDF document text
    • http://kexolifowuj.medianewsonline.com/centralismo_y_federalismo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385887/normal_5fedf832cae1c.pdfIn PDF document text
    • http://kenugizi.getenjoyment.net/26778055492.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/3IgsHNHpEfs/wb?keyword=john%20deere%20l120%20bagger%20partsPDF link annotation
    • http://zijedan.atwebpages.com/digixejemoto.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_off0000e3d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D0 5676 bytes
SHA-256: 8fd711b61184e419e2322cd1cd89ca4abaa5103653cf66e596f60122a56abd07
font_01_sfnt_off0000f70e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF70E 11548 bytes
SHA-256: be2603ec81e016344ad37a82b73342b5b836c481a93a8ff18b716120bb340450

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