Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6b4caf7ddf15551…

MALICIOUS

PDF

68.1 KB Created: 2021-02-24 00:38:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 272bd4e10b1fb8f42bcfc436502b2c86 SHA-1: 2afeb415f5a699a9a0339662dcaa8abf3546bee0 SHA-256: d6b4caf7ddf15551f660db95d2909896a1eb6ada3033dc7f2dd749db689d13ce
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://jacksth.ru/wix?keyword=video+game+randomizers PDF link annotation
    • https://cdn.sqhk.co/luwiwaduna/Tjajf7Z/xazodarenagaz.pdfIn PDF document text
    • https://gozexorajive.weebly.com/uploads/1/3/4/6/134610068/xuvujutoweb-xabese-jukexavevuselap.pdfIn PDF document text
    • http://hiziryigit.online/workout_plan_for_gymgccvs.pdfIn PDF document text
    • http://alternativeinfluencenetwork.net/feelings_list_with_facesivtx4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379855/normal_5fd17913d12cb.pdfIn PDF document text
    • https://cdn.sqhk.co/zasokolof/P3aij1U/buvugaso.pdfIn PDF document text
    • https://bosuzegenelulu.weebly.com/uploads/1/3/4/1/134131522/7f58d7139.pdfIn PDF document text
    • https://zudezujom.weebly.com/uploads/1/3/1/3/131384555/3745890.pdfIn PDF document text
    • https://cdn.sqhk.co/xumelesep/ds4jd32/samsung_experience_service_apkpure.pdfIn PDF document text
    • https://cdn.sqhk.co/ridasozewe/gdhjdjf/light_it_up_lyrics_pop_smoke.pdfIn PDF document text
    • https://tulosiwawi.weebly.com/uploads/1/3/5/3/135326734/vezizimiludepogole.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478664/normal_60213f057b536.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468819/normal_5fc82988829c7.pdfIn PDF document text
    • http://lozhobelir.space/school_management_committee_meeting_report7wg19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412761/normal_601a1c7877020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403140/normal_6019ac32879eb.pdfIn PDF document text
    • https://cdn.sqhk.co/pemiduwegam/gfgi5ij/enrichment_fcu_mobile_banking.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kurejaj.epizy.com/59281411348.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_off0000cec8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEC8 5128 bytes
SHA-256: e9d2cfa2a1c5134364add5b5388fd6735ea0127512b6e6fd78fbf60949a17543
font_01_sfnt_off0000e02b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE02B 10420 bytes
SHA-256: 065d5d62030696b936b94566107db85d303db3cf5aebffab793fb6b22f3ae4ca

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