Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2f23db6d7a00d60…

MALICIOUS

PDF

71.8 KB Created: 2021-02-17 04:48:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 166463b52acf01e5d78a2e38e1feb22e SHA-1: ac22b4e4cfd17ab1643dcd8774523ff34c812b49 SHA-256: c2f23db6d7a00d607f5fe00e0b5edc918b5e9e7a486c1962a0e96380dfc1f9f5
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/123?utm_term=what+to+name+a+brown+cat PDF link annotation
    • https://mefiwoteta.weebly.com/uploads/1/3/5/9/135956645/95949.pdfIn PDF document text
    • https://pituluwo.weebly.com/uploads/1/3/1/4/131437949/lovapepinujo_radurejefup_juzirafufududid.pdfIn PDF document text
    • https://gegiwozik.weebly.com/uploads/1/3/4/7/134719936/0aa979272b.pdfIn PDF document text
    • https://nupimixek.weebly.com/uploads/1/3/2/7/132712066/1484360.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461497/normal_601d2cbd1ff9d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484383/normal_5ffc39dad8bb0.pdfIn PDF document text
    • https://numetigovav.weebly.com/uploads/1/3/1/6/131606493/lamumanufofegeb_futoxarutenuzuf_bidopabed_porigipowe.pdfIn PDF document text
    • https://xewulowew.weebly.com/uploads/1/3/4/7/134757629/dekuzu_pabirafe_relolagu.pdfIn PDF document text
    • https://konomotawet.weebly.com/uploads/1/3/1/3/131379362/98387.pdfIn PDF document text
    • https://nakakikixug.weebly.com/uploads/1/3/4/4/134490848/xofoxofokajil.pdfIn PDF document text
    • https://jigurojo.weebly.com/uploads/1/3/5/3/135321607/20e10ac67b7.pdfIn PDF document text
    • http://9gusevshop.website/medical_representative_interview_questionsa1t8m.pdfIn PDF document text
    • https://butopejejix.weebly.com/uploads/1/3/2/8/132814220/woruruwatafibup.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rugeritubaduw.epizy.com/95766802058.pdfIn PDF document text
    • http://mafonoxerinomif.epizy.com/tavatuw.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_off0000de75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE75 5072 bytes
SHA-256: 1f0e8f4a0738a3a6471df5e10f3e612a0353d1ed79f1ba95246591c1cecf950f
font_01_sfnt_off0000efa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA5 10184 bytes
SHA-256: f69384c1e7e96ab1bc52f0f12779ac6f62ff1669169d840a12e6f0e11937d029