Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbf688e804cb6def…

MALICIOUS

PDF

73.2 KB Created: 2020-12-30 05:54:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 6395ff6d16eb610eed0174ea0917ff84 SHA-1: eb33871da546fcacd74d507a62f4be14f4992ab2 SHA-256: bbf688e804cb6defcfb3d0809c6310c963080f9f25e55d42bc72a98a90f761ed
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffmen.ru/123?utm_term=i+am+number+four+book+summary'. This indicates the document's primary purpose is to lure the user to a potentially harmful external site. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://traffmen.ru/123?utm_term=i+am+number+four+book+summary In PDF document text
    • https://static.s123-cdn-static.com/uploads/4401989/normal_5fdfefc11f0b4.pdfIn PDF document text
    • https://zikixitifo.weebly.com/uploads/1/3/4/8/134897390/477687672.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393624/normal_5fbfe440d67d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375504/normal_5f8b994f1c71e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369324/normal_5fe277f23482b.pdfIn PDF document text
    • https://gapuropiti.weebly.com/uploads/1/3/2/7/132740804/wobobuxoteje.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366655/normal_5febeeea83568.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/bekalan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418791/normal_5fbeec98429a1.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/liwara/bates_guide_to_physical_examination_11th_edition.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_off0000e09f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE09F 5124 bytes
SHA-256: d2e8089399d540800237984cf2a28cc29e3204089d2b332aa7ce0b0b6d392e94
font_01_sfnt_off0000f204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF204 11200 bytes
SHA-256: 1f857bc400f112c17e83de3cfdfbf143c2f6df46b9dd4f4dcfe662510049a0a4