Malicious PDF — malware analysis report

Static analysis result for SHA-256 d200a0a6bb651ca3…

MALICIOUS

PDF

85.7 KB Created: 2021-05-02 06:42:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f5968f7d5514db3ea2b4192887e19175 SHA-1: b0eeb4c9174738640d1ebbaa2c9527065b341843 SHA-256: d200a0a6bb651ca313cd90d237a6a493f2eb9f0e15ae95d3f087cbe84e10a8a1
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 0.9993

Heuristics 6

  • 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 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://ponafet.ru/strik?utm_term=white+tiger+masked+singer+performance+we+will+rock+you PDF link annotation
    • https://cdn.sqhk.co/gawagunikuw/82TfUGr/zosevizezipawilosuku.pdfIn PDF document text
    • https://cdn.sqhk.co/kipasewimoni/phdjghf/o_level_english_past_papers_with_answers.pdfIn PDF document text
    • http://tehnikator.ru/3394592171vyv5n.pdfIn PDF document text
    • http://verifiedbadge-lnstagram.com/wild_bird_rescue_center_near_mecpikf.pdfIn PDF document text
    • http://arfesopt.com/a105_material7yuld.pdfIn PDF document text
    • https://cdn.sqhk.co/xokebuzizo/hdjidu5/dolabolo.pdfIn PDF document text
    • http://parhelifrl.space/59559639992q23ve.pdfIn PDF document text
    • https://cdn.sqhk.co/sabiwizi/gfhficC/cnc_meaning_in_text.pdfIn PDF document text
    • https://cdn.sqhk.co/savaketiju/ibkUhif/stick_war_2_online_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/vubiwete/kijO9gc/how_to_make_notes_on_iphone_xr.pdfIn PDF document text
    • https://cdn.sqhk.co/xedufoga/0hegjYl/frogger_super_nintendo_rom_hacks.pdfIn PDF document text
    • http://italiahot.fun/tipos_de_chalecos_antibalasydwf8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1e8c0764-4a0f-46ab-84a2-5f63a8a44928.filesusr.com/ugd/6a0acf_f055ef93c57041048492c0d2e5533728.pdf?index=trueIn PDF document text
    • https://9fbeb193-358d-48fe-b9d9-45f8b63f6b3c.filesusr.com/ugd/ab67b9_128e436181244abe888e71e405df8a0f.pdf?index=trueIn PDF document text
    • https://e8c82854-2a0b-4c0f-82de-bac600ce06e6.filesusr.com/ugd/d017d5_8b24471b27bc4221bcbec79f0549808c.pdf?index=trueIn PDF document text
    • https://e942959e-95af-4115-ab05-a6e38533eaad.filesusr.com/ugd/66f7a0_d3ab739d4d4e4195996f7defe550bd16.pdf?index=trueIn PDF document text
    • https://972af30b-04c2-4618-b911-83ba0b7fef9e.filesusr.com/ugd/84a5c6_24b058e2b8734e5e91ec5ff7c6910b57.pdf?index=trueIn PDF document text
    • https://041c2bdd-267b-4995-9d72-d071cf2c2b2b.filesusr.com/ugd/ba0b69_9c5a9d9e7a17421c83b554a81d3f8f6f.pdf?index=trueIn PDF document text
    • https://f2d828cf-06d9-46ea-85af-d88b0bc20d44.filesusr.com/ugd/501a20_dc26ba8a5c274559a57f5fcf1346bde7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7e9f897-b616-493d-81b6-c083b352f543/91415438869.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/076dbe16-a1ab-4e94-8863-ff7495e7218f/el_principito_libro_completo_para_nios.pdfIn PDF document text
    • https://1a899ca6-11bf-4464-971e-4bf0b885e765.filesusr.com/ugd/4ac3ff_315a7e8aa7a8445daba1008bab2cca0c.pdf?index=trueIn PDF document text
    • https://9d76d0c6-5807-43ac-a2ba-7b4112d1a20a.filesusr.com/ugd/5cd33b_a7285d89a8d943cc81becc7b208b5f4f.pdf?index=trueIn PDF document text
    • https://7d14b3fe-44ab-47f5-a5a4-fb5d7998febd.filesusr.com/ugd/ba499c_4c2d61d6d5ea408fa121d3eacb5f329e.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010eca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ECA 5840 bytes
SHA-256: 06379c4c5fea821bd6eea3db94f7d89611b66b274948fcfd7074c769f60d2775
font_01_sfnt_off000122a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122A6 11284 bytes
SHA-256: 9b52dfdb1aaaf178dc25de5d91e40f65b30f6be647e90e4f18fe9d348b9f7551