Malicious PDF — malware analysis report

Static analysis result for SHA-256 0768840d810abdbd…

MALICIOUS

PDF

65.6 KB Created: 2020-11-24 13:56:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 0a9da1860ef693a94e0edc09edcfd85f SHA-1: bf6c90be938a572ac2d717cc9b3c1ab397fa09ca SHA-256: 0768840d810abdbd9cf5293d8b676a9b60c373715c54a47ff512af85f7b49902
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by ClamAV as a phishing trojan. The ML classifier also strongly flagged this PDF as malicious. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or further payload delivery.

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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffine.ru/strik?utm_term=halloween+cut+and+paste+worksheets+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4415546/normal_5f99944e41eb7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408878/normal_5f9edfcc83bf8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393901/normal_5fb6a0209ae9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365661/normal_5f877a5a48baa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488558/normal_5fa912f84b0fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449205/normal_5fa871498ff86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370525/normal_5f8b779df2d6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376105/normal_5f8d4b27c2fd8.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/zuxime/s5_rtr_brushless_esc_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/cambridge_checkpoint_science_coursebook_7_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00b9762f-541d-4bef-88a9-e334890f3e91/tiwifuraze.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/62014737060.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/interview_questions_on_leadership_skills_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86797959-5d20-40cc-a0e3-685922e66a92/dadanog.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_off0000c4b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4B7 5360 bytes
SHA-256: f2f5063cdc2856d46c92393eceddd8bbf2cbfe8b107767ed8b6a3160a6410093
font_01_sfnt_off0000d6f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F8 10060 bytes
SHA-256: d03b4548405a9d91c7ac159042d3298fafdf8cd8d876e5188aaa3faa9271e008