Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d5e234ed494c5fc…

MALICIOUS

PDF

81.6 KB Created: 2021-03-25 12:29:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: f3c5ef8fdb986eed9d4cb2f38e8cc6a9 SHA-1: 27d2a3d66eade158459fefea429be10ac45f50b9 SHA-256: 2d5e234ed494c5fc6aa6259522a34a60031baa0216fb94624159a4d9f1f703f9
206 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The heuristic 'SE_ENABLE_LURE' indicates the document likely prompts the user to enable macros or editing, a common tactic for malware delivery. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • 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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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://fokemale.ru/award?keyword=unable+to+add+text+to+pdf+document PDF link annotation
    • https://cdn.sqhk.co/kajutizikodu/uJhazNX/mr_gunman_game_unblocked.pdfIn PDF document text
    • http://beliyden.xyz/content_and_process_theories_of_motivationbrzoo.pdfIn PDF document text
    • http://freud.icu/91931572304tq70q.pdfIn PDF document text
    • http://salleapp.xyz/suunto_ambit_watch_strap_replacementtwl99.pdfIn PDF document text
    • https://cdn.sqhk.co/moxibusas/cifgggf/gilezumulazulojuxafozaw.pdfIn PDF document text
    • https://cdn.sqhk.co/texafikogot/rhhzvGQ/outbreak_undead_scenarios.pdfIn PDF document text
    • https://cdn.sqhk.co/lodabazul/Aigrial/car_accident_reports_nj_today.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481522/normal_6003c3281ad72.pdfIn PDF document text
    • https://cdn.sqhk.co/zumedizojas/qj2mHgj/buwosopobu.pdfIn PDF document text
    • https://cdn.sqhk.co/jebanufebejo/icificJ/pibivomitidipeg.pdfIn PDF document text
    • https://cdn.sqhk.co/serojimo/cicflje/msc_for_me_app_not_working.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480756/normal_5ff1ae3f136bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478685/normal_5fd661228af7d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469355/normal_5fcc6093634b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465919/normal_6024101a2f1ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414153/normal_600e366eeeb4b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367301/normal_60062aa153eba.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://85ed388a-52e0-4e79-9737-9d4b769dda71.filesusr.com/ugd/bb10c5_914635389d964cd8b6294dc01d6fa0b9.pdf?index=trueIn PDF document text
    • https://d78d2789-9aef-4bfd-88be-9093bec910ef.filesusr.com/ugd/87a178_9f95c6dfaf254a91841826735927140b.pdf?index=trueIn PDF document text
    • https://4b5f4e46-8b81-4257-bf39-61fc08ba57b0.filesusr.com/ugd/7ea8bb_068ad7ec1f9c4eefa68b88797e4b9a6e.pdf?index=trueIn PDF document text
    • https://29474179-7c7c-44ae-84e0-3c37792f2e25.filesusr.com/ugd/7f817d_d9693095095b41f6812bb52bcd67cca5.pdf?index=trueIn PDF document text
    • https://a5a7f18c-b887-48a0-80cc-3627c14345d5.filesusr.com/ugd/609f59_9cbd8f8434b449c49ed091098d034fd3.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D1 5060 bytes
SHA-256: c4ec027d25f00685eb85a96cb8bcb1b5608c8fb0df678403cc3bcd72a2cc56fd
font_01_sfnt_off000102fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102FA 11644 bytes
SHA-256: 8340c36fec85b15ef9c0917a41ea485445d1c3ee7c317d6bf4cff25453d25c1f
font_02_sfnt_off00012a9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A9F 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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