Malicious PDF — malware analysis report

Static analysis result for SHA-256 95fd717d082da604…

MALICIOUS

PDF

75.2 KB Created: 2021-03-29 07:25:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c59b2ce39f354c2107fd6dec1a409da8 SHA-1: 1cd4f826f20a80377bea7f3d097ffe06a01dc883 SHA-256: 95fd717d082da604ee0b1d67492fa8286cb8c8ebc12771f94751b1835ed7361a
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 0.9997

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://lozipotod.ru/strik?utm_term=designing+the+user+interface+6th+edition+pdf+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4457570/normal_605f1aaa9c3aa.pdfIn PDF document text
    • http://lovelyhouse.online/42564154534yayga.pdfIn PDF document text
    • http://drive4mclanemilwaukee.com/kazaruroredudmkpzb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382952/normal_5fe9281e3559b.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/Cnjdbf2/international_marketing_notes.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwaseja/gdtljgW/47843307437.pdfIn PDF document text
    • http://deflecfcvy.best/gajovelokajutun0kgxf.pdfIn PDF document text
    • http://blancop.xyz/behold_the_dreamers_ebook_freesh7qy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393751/normal_60551a68028eb.pdfIn PDF document text
    • https://cdn.sqhk.co/nuduniguwufo/ktif2jb/bob_s_world_super_adventure_apk_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/sevafeluba/hcXgiip/webakobibalugeziribu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387033/normal_60376771383cf.pdfIn PDF document text
    • http://bioforce-co.site/worksheet_math_grade_4_multiplication2mcgf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461201/normal_6004c0d497eb4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366063/normal_5ff25edb49bd0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0ecef3a8-5193-4df1-8dcb-1b7dd0f2be2a.filesusr.com/ugd/e6092c_4f73fd5c7bf44f83b9899b6698085308.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/nemolisejusibowute.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/blackbird_beatles_chords_tab.pdfIn PDF document text
    • https://68e1e3d4-268d-49bc-a8aa-b119cb10fea7.filesusr.com/ugd/3ceeb9_4720d514b5f54c0f9e23357b25dc13cf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/emergency_reporting_ultra_secure_login.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/jesisek.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_off0000e8f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F4 5540 bytes
SHA-256: bcd55e9829895078fbc69e94c817b3236a8bd8b21c4361d34533153ea0b55e82
font_01_sfnt_off0000fbc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC7 10468 bytes
SHA-256: dbe1b385fe0bee3c983a41f0d976cef89299900c59bb70210c21fb9345ae2477

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