Malicious PDF — malware analysis report

Static analysis result for SHA-256 a760235d5710977d…

MALICIOUS

PDF

222.4 KB Created: 2021-01-02 12:52:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 23f557667f50fa4638f6e16ef0c1d85d SHA-1: 8ffdac7e31679e4899140f88d62c75ff06102ad9 SHA-256: a760235d5710977d8e1ae1db1a72961a26862b756aedb5a9b91ee8a98a756df2
162 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support this assessment. Although no scripts were explicitly extracted, the PDF structure and embedded URL suggest it's designed to lead the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/aws?utm_term=pulmonary+embolism+guidelines+2014+pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4382949/normal_5fe5dfa88bdda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423462/normal_5fd8b4c229f6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387808/normal_5fe6c26568c2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384304/normal_5fb25aa4cc228.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459035/normal_5fab8ad73b99f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367938/normal_5f8ac7265fa52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366347/normal_5f9f7c6b7e83d.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/suxugipipolazog/blade_and_soul_equipment_guide_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d6eabd7-88db-4772-9a89-76ae4f4e0a17/94367515930.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2f6af4d-1212-4436-9839-bf5dd71da2af/rusejuvofenenotonanuxutuw.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/zogaferubejagab.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/714080389.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/meditation_mantra_music_free.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_off00032e6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32E6F 6016 bytes
SHA-256: c15a3a0f20796193d27933199cdc36ef64c74ddbe9f04091bcb93fc98c463a49
font_01_sfnt_off000342db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x342DB 12696 bytes
SHA-256: 479a3525a833a9a110d061c95994079f97593f34a3e55003df4bd67926f8a0bb

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