Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1d1bbe92bf7dacb…

MALICIOUS

PDF

72.1 KB Created: 2020-12-15 12:45:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 0f2edff198dfb73a2307811c8387a5f9 SHA-1: bd2adaf5b09fd906ac6a1405a43c718a0936b75f SHA-256: b1d1bbe92bf7dacb9c12f6b5e92e5e196142292bb65cb324385556fe9d81ee35
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gettraff.ru/123?utm_term=2011+the+dbq+project+world+history+answers In PDF document text
    • https://static.s123-cdn-static.com/uploads/4486552/normal_5fcc1ad20372d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383922/normal_5f8da1987529e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f46b614e-0d4d-4e04-b8db-d2762bcbd99c/movazuguboxamujawof.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/44192874466.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/826cd918-6d6e-44e8-a1f6-253da4573374/3345864285.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/58189312724.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5ee23c02f22b9d04e7ac/1606377187556/cbs_fresno_tv_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/dezenipov.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc557d06609fd0ee7af108f/t/5fcdd09d05ddc9599d4327fd/1607323805140/jodokabafazupajojagi.pdfIn PDF document text
    • https://s3.amazonaws.com/dazemi/hazop_report_template.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc190673dfdd95b60d9d018/t/5fcdcc16e43f2b00a8c976f9/1607322646598/61568735822.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f1b0084698658e5e73ac/t/5fc1f315eaf37e3b64e1cf55/1606546201651/58351293605.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_off0000d7e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E5 5928 bytes
SHA-256: 6c7232b44c79925e67508007f86ffe8d3e507b7b198f3a8c168de318b6a9ac53
font_01_sfnt_off0000ec1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC1C 11732 bytes
SHA-256: 30c5cf46e50b7da2434fbc3c7e1e7f0faee8892abdabe053c4af19cf71e2d5e5

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