Malicious PDF — malware analysis report

Static analysis result for SHA-256 7af28cb3edf7afeb…

MALICIOUS

PDF

89.9 KB Created: 2020-11-25 06:16:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 3142c42b9dc4ed7ae923da79d9efaea5 SHA-1: 4a4318c7e718e2cf1318d1b29604e231cc749688 SHA-256: 7af28cb3edf7afebdbde20a8329d9841260118f5b0709b7545518ef6fdf7a4b8
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://traffset.ru/wb?keyword=acopio%20y%20procesamiento%20de%20informacion PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4461505/normal_5fa2bdc5cc873.pdfIn PDF document text
    • https://nevipezuke.weebly.com/uploads/1/3/4/6/134652321/3160891.pdfIn PDF document text
    • https://salabupomisopef.weebly.com/uploads/1/3/4/6/134631393/5072573.pdfIn PDF document text
    • https://pebekokinusixi.weebly.com/uploads/1/3/4/5/134506994/bewisu.pdfIn PDF document text
    • https://joguwezur.weebly.com/uploads/1/3/4/5/134500750/kadibul-zuxoxizosipo-jepufike-risusine.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425909/normal_5f9eb90b40d82.pdfIn PDF document text
    • https://xemawegomefere.weebly.com/uploads/1/3/4/7/134736207/e5c40023b47a9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471467/normal_5faa2af40a9ce.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/zonuketowomidun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6db3dcf6-057c-433f-bc30-a0eb37e4f1eb/electrolux_epic_6500_sr.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/49036211557.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_off000121f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121F3 5360 bytes
SHA-256: ce885ea69ac6472b66cc43be08734be71d2bcbe6aa2dcd6bc9ffc190a4a95be9
font_01_sfnt_off00013426.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13426 11348 bytes
SHA-256: 389f00808b7ea31fbad206833317d33b46951b9def6d19c70a40074e088379bf

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