Malicious PDF — malware analysis report

Static analysis result for SHA-256 74725a7965b7ae0f…

MALICIOUS

PDF

76.8 KB Created: 2021-02-27 12:34:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 315e3d30e164d2d5c39a715470ad864b SHA-1: 37294da8cedf7832363deaf7a0cd2e14859320ca SHA-256: 74725a7965b7ae0f907a4da99090e0849590eeb26632ae2439659ecf81f78f51
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/award?keyword=dell+optiplex+9020+sff+computer PDF link annotation
    • https://raxorevowipafe.weebly.com/uploads/1/3/4/7/134765671/720083.pdfIn PDF document text
    • https://cdn.sqhk.co/rubuxupab/jbjiTmD/new_country_music_christmas_albums.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476011/normal_6001a1cd4d8d0.pdfIn PDF document text
    • https://zezupivipikoko.weebly.com/uploads/1/3/4/5/134596705/jojijikuja.pdfIn PDF document text
    • https://cdn.sqhk.co/xudekutof/gejg8gd/75212828670.pdfIn PDF document text
    • https://vinadesafabav.weebly.com/uploads/1/3/5/3/135305522/4092385.pdfIn PDF document text
    • https://nunosutelakib.weebly.com/uploads/1/3/1/3/131383720/995b313ebf40054.pdfIn PDF document text
    • https://bonujuvab.weebly.com/uploads/1/3/2/7/132740321/c8f1ab.pdfIn PDF document text
    • https://wezefumuge.weebly.com/uploads/1/3/4/6/134614004/gonogudajebu.pdfIn PDF document text
    • https://jenodaxadow.weebly.com/uploads/1/3/4/0/134012655/vigiwo-wilufotubifa-sobol.pdfIn PDF document text
    • https://vexepediv.weebly.com/uploads/1/3/4/6/134668456/6979207.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369793/normal_6039befdf20a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479905/normal_601ddc78390a7.pdfIn PDF document text
    • https://dexutafabo.weebly.com/uploads/1/3/1/4/131453723/fofepewapov.pdfIn PDF document text
    • https://masomubomifok.weebly.com/uploads/1/3/1/4/131406343/luluwo_rukosofudewox_dafofaxumowexef_kipigo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416495/normal_601d93b1589a5.pdfIn PDF document text
    • https://vigegenatiborig.weebly.com/uploads/1/3/0/7/130740049/pepawigapunufe-bilirus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404112/normal_601b29dfb11b7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ef7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF7B 5448 bytes
SHA-256: 61d57405ea15c178e3cf513e538e08d4966e7d3515c831c0a01e8a9661c7680e
font_01_sfnt_off00010203.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10203 10624 bytes
SHA-256: b82cdc90e11f9cb8c04a5ebc6011f8b6e883a5e401a4cedb50c85b5a98b75385

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