Malicious PDF — malware analysis report

Static analysis result for SHA-256 a79f98823bca1f14…

MALICIOUS

PDF

71.9 KB Created: 2021-02-11 06:38:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 10434b6469f2c94378f6acdfd2488aa6 SHA-1: e882ecf8fa802b9048703942fc4229f914e4e0ea SHA-256: a79f98823bca1f14f4176e3a784c4b4016807687f674ce0004db9b3bb4653f60
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://druttle.ru/123?utm_term=monopoly+negative+economic+profit+graph PDF link annotation
    • https://nakabupibuf.weebly.com/uploads/1/3/4/6/134608610/2977970.pdfIn PDF document text
    • https://wurokilusonopos.weebly.com/uploads/1/3/5/3/135345649/1b796c5.pdfIn PDF document text
    • https://sugovodeko.weebly.com/uploads/1/3/2/6/132681033/2539208.pdfIn PDF document text
    • https://faboduvo.weebly.com/uploads/1/3/5/3/135343103/gazogevagesuwaxafa.pdfIn PDF document text
    • http://afracheat6.xyz/rofuvumzzr.pdfIn PDF document text
    • https://cdn.sqhk.co/zexoribuj/ig1hdhf/rajesex.pdfIn PDF document text
    • http://garantiya62.ru/android_o_linux_kernel_versiondhz55.pdfIn PDF document text
    • https://tirotulesi.weebly.com/uploads/1/3/4/8/134849952/tokuforujumo.pdfIn PDF document text
    • https://cdn.sqhk.co/rufopunuk/ijbHskh/dugamiwejiwoto.pdfIn PDF document text
    • https://lajanasana.weebly.com/uploads/1/3/4/3/134368101/didatu-risojuwuka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501380/normal_6013f4a76664c.pdfIn PDF document text
    • https://puwulafu.weebly.com/uploads/1/3/5/3/135329465/tepizetuwerexop-bewuf.pdfIn PDF document text
    • https://nusutaligufobam.weebly.com/uploads/1/3/5/3/135393176/vusux.pdfIn PDF document text
    • http://ig-about.net/vudemogisixugijojijs079g.pdfIn PDF document text
    • https://wimekigulaz.weebly.com/uploads/1/3/1/1/131163744/tizulemulerig.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_off0000dde1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE1 5416 bytes
SHA-256: fe58966bccb527e366dfb1d9e387d265670cb01dfeb2034272154456b94b5a61
font_01_sfnt_off0000f04c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF04C 10044 bytes
SHA-256: a16a850c9a542a235b8cd9e892f18a2e77c1ebc42a11ce0156eb3057b95660c0