Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b7b5dcff50a6f98…

MALICIOUS

PDF

66.1 KB Created: 2020-11-23 13:02:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 85345bef0fbcce9edb7b72e58f149c35 SHA-1: da579c182ddda33a850c84b3856db8b04ff0f9f4 SHA-256: 0b7b5dcff50a6f9864a8c7666691bd0b4afb1cdb1761665e3be31ee50111fe28
214 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to external PDF files hosted on services like Weebly and f-static.net. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure, specifically 'ggtraff.ru'. The ML classifier and ClamAV also flagged this file as malicious, suggesting a phishing or malware distribution intent. No scripts were extracted from this sample.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/strik?utm_term=destiny+2+chalice+of+opulence In PDF document text
    • https://memefuzagimo.weebly.com/uploads/1/3/4/6/134612336/sorifupiralo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499351/normal_5fb847d56081c.pdfIn PDF document text
    • https://rawogozanukej.weebly.com/uploads/1/3/4/6/134623914/zaxuwilivoku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375541/normal_5f89b1710fb0f.pdfIn PDF document text
    • https://dotofinadi.weebly.com/uploads/1/3/0/7/130740455/sedaxig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366048/normal_5f96e58b9bb63.pdfIn PDF document text
    • https://bezoduremudopez.weebly.com/uploads/1/3/1/4/131437412/c77077ae0d039b.pdfIn PDF document text
    • https://gutomaxitokivi.weebly.com/uploads/1/3/1/3/131383747/ragixefubovina.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413002/normal_5f9506e16e00f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369764/normal_5f87dc38d0186.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384642/normal_5fbacc7b27e90.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_off0000c6b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6B7 5240 bytes
SHA-256: cdf9697f341881e77bccd05807a41dde02af903d53bab7fc67ff9418f77dc49a
font_01_sfnt_off0000d8a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A3 10136 bytes
SHA-256: f778b570ab24470a2a86c3a145f5b0a85baacf0b77ac414bdef24d383d75a107

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