Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf7916892cfc9834…

MALICIOUS

PDF

74.6 KB Created: 2021-03-03 13:56:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 54c475cf936284fc75097400da0bd21d SHA-1: 5c53dd40ffb099ff9d43f9cdb3adfa83a116c76b SHA-256: cf7916892cfc9834cedc509fdf6ffb4d0c8391a1e51fa870aa7a2c5ba043b2f3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, with one prominent URL pointing to zajinet.ru, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are characteristic of social engineering lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://zajinet.ru/strik?utm_term=vizio+tv+model+e701i-a3 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4449616/normal_5feedfe0918fe.pdfIn PDF document text
    • https://cdn.sqhk.co/kugefiruxat/9Qzgdia/6717967026.pdfIn PDF document text
    • https://cdn.sqhk.co/busoleva/fgeiahh/new_york_city_fc_development_academy.pdfIn PDF document text
    • https://cdn.sqhk.co/julukimesof/2jigjrZ/23245985495.pdfIn PDF document text
    • http://kumululurug.scienceontheweb.net/63355379654.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367922/normal_5fdb05f6b248a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368494/normal_5fda04065e02b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404955/normal_601f7a6120c15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386824/normal_6039a0337387a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443812/normal_5fe6ffd69bd11.pdfIn PDF document text
    • http://fuzubijixulux.mygamesonline.org/voluputeluwuzapegimejufen.pdfIn PDF document text
    • http://betijeduw.getenjoyment.net/wine_bible_dream_meaning_islam.pdfIn PDF document text
    • http://spainsale.pro/xukoforidogovejmfzv6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378641/normal_6009175cd0b04.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/gixawetopoli/wexojuguweraxo.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/18536228535.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/vineland_adaptive_behavior_scale.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_off0000e789.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE789 5240 bytes
SHA-256: 700b4bb64b08907acb0b958c1a148128b145b0df98674f7b4b8d2254039e816d
font_01_sfnt_off0000f975.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF975 10428 bytes
SHA-256: 449ea342cb3f4671e8253e29e386917a4e5bca129dcf5f01bf9668b12ae82e6d

Open this report in the interactive analyzer, or submit your own file for analysis.