Malicious PDF — malware analysis report

Static analysis result for SHA-256 df00f54fa0a7cd89…

MALICIOUS

PDF

80.7 KB Created: 2021-04-06 16:07:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: cb578961bd57da643dd12e7b0ccc0971 SHA-1: 5a46384256ca30c30708ff46c834e784109bee96 SHA-256: df00f54fa0a7cd8938d646c5310790830c934ccb7ab60232c9f8564508b33d9e
186 Risk Score

Malware Insights

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

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 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jacksth.ru/aws?utm_term=husky+1+gallon+silent+air+compressor+home+depot PDF link annotation
    • https://cdn.sqhk.co/sozodumupof/ijS04tT/break_the_prison_undead_mp3_download_by_abochi.pdfIn PDF document text
    • https://cdn.sqhk.co/xizojotozodi/hiDhhgh/magia_record_ios.pdfIn PDF document text
    • http://myluckywin.site/zorof4r927.pdfIn PDF document text
    • https://cdn.sqhk.co/ravuviwidi/eC2mhgq/alien_drive_me_crazy_2_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/worekoxe/giplwux/dobekugidopexobiwubi.pdfIn PDF document text
    • http://usesalle.xyz/learning_and_memory_from_brain_to_behavior_4th_editionnwj9o.pdfIn PDF document text
    • https://cdn.sqhk.co/vofudejobif/dibidhM/tevubafeda.pdfIn PDF document text
    • https://cdn.sqhk.co/lirebirab/bQicibS/16682407958.pdfIn PDF document text
    • https://mizinunebij.weebly.com/uploads/1/3/4/6/134660950/benex.pdfIn PDF document text
    • http://file-id.ru/wisujejarululetolevofiw94km.pdfIn PDF document text
    • http://paktum.pro/agenda_2020_para_imprimir_gratisfvq9i.pdfIn PDF document text
    • https://cdn.sqhk.co/jezuleku/uhjhbib/zombies_monsters_robots_private_server.pdfIn PDF document text
    • https://cdn.sqhk.co/danajuva/Iu0jghb/wevinenatepus.pdfIn PDF document text
    • https://cdn.sqhk.co/zupitefa/ahfly9w/gebusujavazuxezugax.pdfIn PDF document text
    • https://ritosigom.weebly.com/uploads/1/3/1/4/131453630/bulemizoxofoduzeli.pdfIn PDF document text
    • https://cdn.sqhk.co/litawoxelida/jbOAbst/fade_hairstyles_black_ladies.pdfIn PDF document text
    • https://kekuzisalan.weebly.com/uploads/1/3/0/8/130813403/be2b097a4d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fegidil.rf.gd/22656660829.pdfIn PDF document text
    • http://gofapebilim.rf.gd/calculus_on_manifolds.pdfIn PDF document text
    • http://vamudeb.epizy.com/easl_hcc_guidelines_2018_ppt.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_off0000fa93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA93 5664 bytes
SHA-256: 5c90e09ec860aedc15b4f24f0e0cdb4e283ea70eb97c3a2b9c600de47be545ba
font_01_sfnt_off00010dbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DBB 11644 bytes
SHA-256: 5fbcbca151e7a0a1997d801d204d4c3199258f8ae0f83e6b714339b10dddc468

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