Malicious PDF — malware analysis report

Static analysis result for SHA-256 05c67b1286768e58…

MALICIOUS

PDF

64.4 KB Created: 2020-11-09 23:16:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 96926f18f3f3d51f5ed86770d8d619fe SHA-1: d16017295938f667a4182c6572ae6bc8129efab3 SHA-256: 05c67b1286768e58e3802441c624f64c8fca084a690347b8e004b595f2847d24
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded URLs are the primary indicators of compromise.

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 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.
  • 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://trafffi.ru/123?keyword=religious+tolerance+act+1649 PDF link annotation
    • https://fukikabigo.weebly.com/uploads/1/3/4/4/134457586/nolurabotavu_lomuba.pdfIn PDF document text
    • https://nepuvaduwixoki.weebly.com/uploads/1/3/4/5/134525355/9325810.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381735/normal_5f949fc0c15d5.pdfIn PDF document text
    • https://dewufixibofapez.weebly.com/uploads/1/3/4/5/134596153/gikosozitadetupef.pdfIn PDF document text
    • https://xijonezamo.weebly.com/uploads/1/3/1/4/131407630/gafovalasepamove.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465705/normal_5fa4fd9caeec4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369493/normal_5fa0726677d2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369328/normal_5f8b05a6d765c.pdfIn PDF document text
    • https://lesajevix.weebly.com/uploads/1/3/4/3/134318042/345c37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386848/normal_5f9e8c4631602.pdfIn PDF document text
    • https://pivozedotafi.weebly.com/uploads/1/3/1/0/131070355/177646.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_off0000c123.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC123 5424 bytes
SHA-256: d8bcffc3726527d3555a4f023f8d17c187438e01ea77e430b605f197e0392607
font_01_sfnt_off0000d3aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3AA 9828 bytes
SHA-256: b057d1fcb7cf64b88a3e7ca5799a8388b446c3467e92ec8df5ac304305f2512b