Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7495672d52c7278…

MALICIOUS

PDF

63.5 KB Created: 2020-12-30 13:43:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 5ae05a2007026f53149399ca035f90dc SHA-1: 9cb73002d3bfcf33272fcd96099452f55abfd336 SHA-256: d7495672d52c7278e1ed686f52b8662b6e05fefe0183e00a5ec268ee5f994003
154 Risk Score

Malware Insights

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

The sample was flagged by a critical heuristic for linking to known malicious redirector infrastructure, specifically 'https://traffking.ru/strik?utm_term=fire+and+water+together'. An ML classifier also assigned a high probability of maliciousness. While no scripts were extracted, the PDF structure and embedded URLs strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://traffking.ru/strik?utm_term=fire+and+water+together In PDF document text
    • https://cdn.sqhk.co/ludozenidi/ggogeuO/vovelibipev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412403/normal_5fdc86aeafb51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403120/normal_5f97a1b022198.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367627/normal_5f8e652d7937e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445869/normal_5fbea8544dacf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478422/normal_5fcf529dcaf29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415950/normal_5fd81d4bee94c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408594/normal_5fc06d573d99d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372104/normal_5f8bd59624b97.pdfIn PDF document text
    • https://cdn.sqhk.co/fopujetoros/bd8CVja/jebirezivana.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447096/normal_5fbb374705091.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445866/normal_5fdc373972142.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485161/normal_5fb7c79638008.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460982/normal_5fbe3caf63a20.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_off0000bd9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD9F 4924 bytes
SHA-256: c3a458af1b7d8354dba30fe3a28aa958baef0a38307a96422401b8e86e5a4a8e
font_01_sfnt_off0000ce6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE6E 10080 bytes
SHA-256: d7b72f9a8eadb77705ed412385a40e5aa0b9af990c8bbddc8e8beebe4ed13170

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