Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6505f6dae7d145a…

MALICIOUS

PDF

76.1 KB Created: 2021-03-23 20:48:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: cd6ed6b7a1032780aefa1fb4cce1d2da SHA-1: 057c4fed8d4f51b3d1521bf67d4323fb02847ce5 SHA-256: e6505f6dae7d145a06f851ec41559fd664b36da4017459f4a1747fcf82b79c24
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://maypoin.ru/wix?keyword=mps+formula+for+exam PDF link annotation
    • http://xagugudel.sportsontheweb.net/88624848964.pdfIn PDF document text
    • http://biolinkus.me/24764224084rpyah.pdfIn PDF document text
    • http://gmetry.online/foxconn_motherboard_vga_drivers_for_windows_xp79psc.pdfIn PDF document text
    • http://hot-money.fun/palidemoxunexeda2ovsz.pdfIn PDF document text
    • http://proba7.xyz/2121720613084dgt.pdfIn PDF document text
    • http://xenakasewexibal.sportsontheweb.net/afghanistan_soviet_war.pdfIn PDF document text
    • https://cdn.sqhk.co/zowuvutevak/WPlhche/94498314833.pdfIn PDF document text
    • https://cdn.sqhk.co/viforoge/YicW1gg/crash_car_smashy_road_goes_on_water.pdfIn PDF document text
    • http://siviveko.getenjoyment.net/pazizerixawimigawusexime.pdfIn PDF document text
    • http://jidokove.scienceontheweb.net/minnesota_rules_of_evidence_impeachment.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pogetowem.onlinewebshop.net/makozitedumorofojepa.pdfIn PDF document text
    • https://s3.amazonaws.com/wetevali/automation_anywhere_interview_questions_and_answers.pdfIn PDF document text
    • https://73b3f487-90f5-41a6-bf44-750372f72efd.filesusr.com/ugd/39e8d0_7c9261e09eec41abb65587210b87d44e.pdf?index=trueIn PDF document text
    • https://39c10a3a-92c6-412a-a1bb-b8a1fc48fbc4.filesusr.com/ugd/259099_e2f799b9b1274919a0d8bb0797fa913a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/forupokisip/magazine_ad_template_psd.pdfIn PDF document text
    • https://584dc5e1-4449-4bca-b3d9-d0e1fa08a972.filesusr.com/ugd/185caa_764791cc30754f91be7f8ee07d52ea1d.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_off0000ec27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC27 5120 bytes
SHA-256: c1d9c6dfa5d4a8ae9e559b216fde6a459c9e9d60d841282ca151893e39ee131c
font_01_sfnt_off0000fd8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD8C 11152 bytes
SHA-256: a8822f8a7a3aab3568d371b691ae06380721a371b1ce6960dc1c562f92a56aa5

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