Malicious PDF — malware analysis report

Static analysis result for SHA-256 a08f5203429e45d3…

MALICIOUS

PDF

80.6 KB Created: 2021-03-30 11:06:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6838c71c3bb434c1438c130eb689e985 SHA-1: 849b5f1ea48950f6234dce93e16e5461f7222e52 SHA-256: a08f5203429e45d38f30de6dbd6f819cc07a519bcab2d8202baa6025a42d0c89
126 Risk Score

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 0.9998

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/123?utm_term=bitlocker+performance+impact+gaming PDF link annotation
    • http://idslim-italia.site/858385006216kcs5.pdfIn PDF document text
    • http://zijiwox.iblogger.org/97527686210.pdfIn PDF document text
    • http://mini-cam2.club/hoover_steamvac_widepath_parts_diagram60648.pdfIn PDF document text
    • http://hookup153.fun/samsung_un55d6000sfxza_power_supply_boardziqmq.pdfIn PDF document text
    • https://cdn.sqhk.co/kosifodalab/asbidgf/93302464658.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/Goge6ib/lean_bulk_workout_plan.pdfIn PDF document text
    • http://wumijodurixemi.22web.org/2124844400.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7f993087-45f6-41f4-96e5-9dcaca18fb91.filesusr.com/ugd/9a92dd_b46925537ba34139ba14cbe48766c003.pdf?index=trueIn PDF document text
    • http://bikumekomem.epizy.com/kesuna.pdfIn PDF document text
    • https://0a3c8164-ddd9-4522-8472-457ce31ece15.filesusr.com/ugd/d32f78_1fb82d1775b546f68f4069c9aa627642.pdf?index=trueIn PDF document text
    • http://zedapubijudubux.rf.gd/21475701144.pdfIn PDF document text
    • https://s3.amazonaws.com/wurivuve/6143391763.pdfIn PDF document text
    • https://be9c8297-50e9-4ec8-be22-7cc4068ef96a.filesusr.com/ugd/fc3b0b_173146d42cd84a90ba6972c8a5f805b3.pdf?index=trueIn PDF document text
    • http://zorenepovapaj.epizy.com/bavofawugawupunanogi.pdfIn PDF document text
    • http://setonan.rf.gd/csl_behring_gmbh_annual_report.pdfIn PDF document text
    • https://36535336-4f9e-4c0a-b1ad-3385cb5d4299.filesusr.com/ugd/15ebe2_c70413ec6d674beda653cd500f4fb678.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/megelugik/beatles_blackbird_music_sheet.pdfIn PDF document text
    • http://zavivemigowoson.epizy.com/44870380865.pdfIn PDF document text
    • http://legofovivaxom.epizy.com/36735954151.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE0B 5268 bytes
SHA-256: e46df69c0025f228f6b46843e6f3e1c52cf2b0c521ecad7b207835ae39294596
font_01_sfnt_off00010fec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FEC 11248 bytes
SHA-256: 7fab47374841ad2c973341234e751f0296cdca4c82b1a695a843cc93732df5d8

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