Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fe4eb273aab1b2e…

MALICIOUS

PDF

76.6 KB Created: 2021-04-05 02:33:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 72534f65b91a8793e7764a489117e359 SHA-1: 9921da2753d70eb6489e089c453797ba88a41469 SHA-256: 6fe4eb273aab1b2e7f7fbdeacd913ebeb94be7ea98b655fd003ee7e2314acfa2
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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://dugedepap.ru/aws?utm_term=does+gamestop+repair+xbox+360+consoles PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446494/normal_6052d583da033.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416790/normal_5fe135c249e8c.pdfIn PDF document text
    • http://momarivido.mypressonline.com/aws_cwi_exam_questions.pdfIn PDF document text
    • https://cdn.sqhk.co/vekokoze/dLgflEo/scary_boss_3d_video.pdfIn PDF document text
    • https://cdn.sqhk.co/kewesowovim/jbhdCEi/tisinaxevu.pdfIn PDF document text
    • https://cdn.sqhk.co/kezomerameki/Tmjgjdy/hero_xpulse_200_price.pdfIn PDF document text
    • http://lebizifijafaxim.medianewsonline.com/japafeloxewonubotaxa.pdfIn PDF document text
    • http://rarubife.mygamesonline.org/finnegans_wake_bar_lanzarote.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498971/normal_5fcab57d21797.pdfIn PDF document text
    • https://cdn.sqhk.co/fudamewojaf/hhDhbge/45995388327.pdfIn PDF document text
    • http://vekirexime.22web.org/vufirurabobagaj.pdfIn PDF document text
    • https://cdn.sqhk.co/kazamepa/1jhhig1/fafibipulefoxewamumax.pdfIn PDF document text
    • http://kosamaritaj.getenjoyment.net/21533020908.pdfIn PDF document text
    • https://cdn.sqhk.co/geroterunetu/jdggwjg/chain_reaction_cycles_review.pdfIn PDF document text
    • https://cdn.sqhk.co/lofesaxudiwo/icgeehh/hitman_go_trophy_guide.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5c90cfa9-af55-48e2-9430-1f3580382729.filesusr.com/ugd/e2b09b_f8322ec37ccc4fcba49f465e8f54c6b3.pdf?index=trueIn PDF document text
    • https://469ee322-798e-4c1d-9571-af6764901f97.filesusr.com/ugd/57169b_3a62e5bc8a5f4dafa62fa70bb3f56a4d.pdf?index=trueIn PDF document text
    • http://wurebosuloxu.myartsonline.com/71210605042.pdfIn PDF document text
    • http://nokudumufax.rf.gd/lalitanujufotakav.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_off0000ea14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA14 5920 bytes
SHA-256: bf0ed76ab6495cb733b66dd9ab7bb3c91a4d60913c16b8a4d320cad549403642
font_01_sfnt_off0000fe2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE2F 11336 bytes
SHA-256: 36767db4b26c12a569db9451f6a63f1f03dca0f2e7dd0b2724bfb49616bbf8db

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