Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba3d4c94fc476bad…

MALICIOUS

PDF

96.6 KB Created: 2021-04-19 21:43:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 9d7228905d9e69ffcfa5b9809577975f SHA-1: 212dc80f0614983c35078579f4e747e796b369b3 SHA-256: ba3d4c94fc476bad080f51f8c630f86a0f5a90d8d2cef4722fba705f0e42df7b
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high likelihood of this document being used to redirect users to malicious sites, potentially for phishing or malware distribution. No scripts were extracted, limiting the analysis of direct execution capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 4

  • 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://pelibifir.ru/strik?utm_term=arris+dcx3200-m+remote+code PDF link annotation
    • http://pipavinekiga.mywebcommunity.org/brinkmann_smoke_n_grill_stainless_steel.pdfIn PDF document text
    • http://sumigemag.mywebcommunity.org/alateen_a_day_at_a_time.pdfIn PDF document text
    • http://gta-msk.ru/7mm_rem_mag_reloading_data8kpez.pdfIn PDF document text
    • https://kokilanoru.weebly.com/uploads/1/3/4/0/134012510/172351.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446643/normal_601db34490e6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469623/normal_606e8ce251f52.pdfIn PDF document text
    • http://iminn.ru/block_craft_3d_unlimited_gems_and_coins_apkigg30.pdfIn PDF document text
    • https://viluvaxev.weebly.com/uploads/1/3/5/9/135974466/wawosegu.pdfIn PDF document text
    • https://cdn.sqhk.co/fedovipawe/hhTInjb/10259862859.pdfIn PDF document text
    • https://kamararexunazo.weebly.com/uploads/1/3/1/4/131453861/rafusejuxasovisefezi.pdfIn PDF document text
    • https://jikodidujur.weebly.com/uploads/1/3/5/3/135319234/7893357.pdfIn PDF document text
    • https://cdn.sqhk.co/febowozefu/xEid4D8/evil_cogs_chapter_3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490725/normal_60515a16deccd.pdfIn PDF document text
    • http://rodisawikikofu.medianewsonline.com/40812831679.pdfIn PDF document text
    • https://cdn.sqhk.co/xerolunem/ggibheG/strategic_leadership_business_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/pulobegefuzi/e4ibGhh/nier_automata_far_mod_manual_install.pdfIn PDF document text
    • http://canonsburglake.com/revazatadonupepazgysb.pdfIn PDF document text
    • https://cdn.sqhk.co/zalenemu/dhbfthg/37100978396.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384460/normal_602c7a1340d4d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e12bf33e-fccf-4e83-897f-4f5e17f39daf/nisupimoves.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34c2d9df-54bc-43b0-9944-68bd02f565c2/72683873446.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c12313b7-78fb-4a4d-995f-5728e15db10b/why_go_vegan_books.pdfIn PDF document text
    • http://jowosos.myartsonline.com/cronica_de_una_muerte_anunciada_resumen_personajes_principales.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06d39920-2ac1-4506-88df-ca1f96af26c5/how_to_pair_motorola_baby_monitor_comfort75.pdfIn PDF document text
    • http://tixofimisupabev.onlinewebshop.net/hygiene_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e582e7a3-414b-410d-9483-3b768752abc0/primus_iq_brake_controller_installation_instructions.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_off00013e27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E27 5372 bytes
SHA-256: 45ab61eb4051279c4e88e78fe34619e8a9f55ce1abb5406fff244cef9af7ecd8
font_01_sfnt_off00015063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15063 10708 bytes
SHA-256: 4b27bbccc0a9375b5f26e0df55caa86e4ad26f4e52ef8ed20c97211494cae736