Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffa58ef7b25271d1…

MALICIOUS

PDF

66.9 KB Created: 2021-02-21 05:54:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 8806d20db4fa5313b305d8e10bb882a1 SHA-1: 07ddd462b776bfb94804ee6dcf1f0e360da9fc36 SHA-256: ffa58ef7b25271d173bf33899f65b59db14f48388d72506f02c08e5a6af72e55
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://seumenha.ru/wb?keyword=shure%20ulxd1%20wireless%20bodypack%20transmitter PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403118/normal_5fd27a3798d91.pdfIn PDF document text
    • https://cdn.sqhk.co/marixefe/dshcghq/nosijirositifimotavob.pdfIn PDF document text
    • https://kokujefep.weebly.com/uploads/1/3/1/4/131409677/jepebit.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495686/normal_6004d354ccd1e.pdfIn PDF document text
    • https://rejawezegevipi.weebly.com/uploads/1/3/1/4/131437848/7724018.pdfIn PDF document text
    • https://gumevimarijefa.weebly.com/uploads/1/3/1/0/131071167/xiranolizazaru-motofikuluful-kijewavovexot.pdfIn PDF document text
    • https://rexakutomas.weebly.com/uploads/1/3/0/7/130739652/2527384.pdfIn PDF document text
    • https://lumewogomor.weebly.com/uploads/1/3/4/3/134319436/mabaw.pdfIn PDF document text
    • https://womominajarizu.weebly.com/uploads/1/3/5/3/135392323/2963ff.pdfIn PDF document text
    • https://cdn.sqhk.co/difigobon/LhdD3ic/zifunavakobobebexaligob.pdfIn PDF document text
    • https://jajijonag.weebly.com/uploads/1/3/4/7/134762104/bakateb.pdfIn PDF document text
    • https://basosogufu.weebly.com/uploads/1/3/4/6/134682995/8597d22410e.pdfIn PDF document text
    • https://cdn.sqhk.co/mudifuto/YijsSCN/top_100_songs_2010_australia.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://safipalibeso.rf.gd/three_fold_brochure_template_google_docs.pdfIn PDF document text
    • http://xupapuxonoxun.rf.gd/15979223556.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_off0000c37f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC37F 5932 bytes
SHA-256: a01feef58b9a4e6421e2472053551059fd7ca1490f8668b0833ef046bd40fb2d
font_01_sfnt_off0000d79d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD79D 11604 bytes
SHA-256: 2327c47da5640c1fafa5b585929b4675bc10091cf10ce062f79db7294b13fb14