Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3e4cb82098f98e1…

MALICIOUS

PDF

176.8 KB Created: 2021-04-12 21:31:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6763f41f6667b8af18befbcea45dc7bd SHA-1: 59e3e3a952f447dd87804e2652601f96e8c55c0d SHA-256: c3e4cb82098f98e1d124049908cace1a591be9feae882f17fff62c44a3d0fe4b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://xajibur.ru/strik?utm_term=get+user+id+linux+python PDF link annotation
    • https://luwusimoxoxaxa.weebly.com/uploads/1/3/1/4/131453453/8161145.pdfIn PDF document text
    • http://clebohets.xyz/sentry_safe_117036jdh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450340/normal_601b7d6b781c7.pdfIn PDF document text
    • http://kayikciakademi.com/northouse_leadershipcz72c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368466/normal_5ff2d901cea8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385880/normal_6052e0ad8afb6.pdfIn PDF document text
    • https://lukimozogu.weebly.com/uploads/1/3/4/6/134638062/gowira.pdfIn PDF document text
    • https://lajisoxe.weebly.com/uploads/1/3/4/4/134435468/2497239b3e.pdfIn PDF document text
    • https://zudobusida.weebly.com/uploads/1/3/5/3/135330479/877b320.pdfIn PDF document text
    • http://originalhallyu.com/art_and_the_bible_francis_schaeffer2s4e8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379048/normal_5fd04787d5f90.pdfIn PDF document text
    • http://itwomen.space/descargar_motorola_pc_suitel0wig.pdfIn PDF document text
    • https://lojigimab.weebly.com/uploads/1/3/0/8/130814508/3d338a2ea6b7c3d.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/b616afba-5fa7-4d9b-8d7b-37195bcdfb77/dell_vostro_1500_windows_10.pdfIn PDF document text
    • https://bdee3e82-1fe6-4084-b289-f15f5249f83e.filesusr.com/ugd/749937_629f7c2d47a94bfda0e19737808f2229.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd63daf7-8165-424f-892b-4459d8ff33f4/numomagulumiripazejepob.pdfIn PDF document text
    • https://92fed17e-af34-466b-b3fe-38cd9ef27699.filesusr.com/ugd/192d58_d809268bceb54c57a4070d51e8466409.pdf?index=trueIn PDF document text
    • https://8533cbf3-c0d6-400c-bdf8-8ca38cf0242b.filesusr.com/ugd/135178_6ce928a66c2f4a8386652b686a2e1eb6.pdf?index=trueIn PDF document text
    • https://d064ede3-316f-4d13-8ec5-014b2136b3bd.filesusr.com/ugd/154db6_6b7e8821da224e96b9730842245bab0e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7d34104-b18e-464d-943c-7b8e1c6a37e8/asp.net_mvc_5_music_store_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/765e4109-3267-47e1-83da-4e59398641e0/ranogosesugo.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_off00026e54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26E54 4920 bytes
SHA-256: a4c01eebbf0fb5df75a086eb32c5636da6e549def37942d5d39d373ea9bed37a
font_01_sfnt_off00027f0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27F0E 11848 bytes
SHA-256: e57c26b5ca361bfdcd4e0b1702d15cf03729adfde2b092f6de5e2d17de5d3a0d
font_02_sfnt_off0002a766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A766 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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