Malicious PDF — malware analysis report

Static analysis result for SHA-256 5734798117336d9e…

MALICIOUS

PDF

70.4 KB Created: 2021-01-04 17:40:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 3220fef5c2eba39891a9c0419b537b52 SHA-1: 7fc048c2f43a0cfa6b797aeee1251315aa10da9c SHA-256: 5734798117336d9e7f09fe863e222a400d8c7167184622c6eb0276b1e810d7b9
154 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 malicious URL suggest it's designed to redirect users to a harmful site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • 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/aws?utm_term=draw+io+wireframe+template In PDF document text
    • https://cdn-cms.f-static.net/uploads/4456391/normal_5fb27342dcd8a.pdfIn PDF document text
    • https://cdn.sqhk.co/diratukuz/LsyRigJ/royal_icing_christmas_cake_decoration_ideas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501965/normal_5fbdd8849d9bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406501/normal_5fa506c65762f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466140/normal_5fb5e75ec1828.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/90a1c82c-309e-4336-806f-762bfc953308/etapas_del_ciclo_vital_familiar.pdfIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/60153319326.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d14e7a5a-8ea0-4638-96b5-2aaa849c16ab/dental_hygienist_assistant_salary_utah.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de118f13-097a-4a43-b5ea-a0996e9e6fbf/dexter_public_schools_calendar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2f208ef-6355-4d87-8f66-0c631b128154/vubas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc3097d0-0034-42b7-ab08-78c1a54c36fd/john_oliver_season_6_episode_17.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_off0000d792.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD792 4960 bytes
SHA-256: 756895218f77ac117f6d2c4e387e03784be13ed9e2d0f48acaab42d67a89cf47
font_01_sfnt_off0000e877.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE877 10984 bytes
SHA-256: 3c2cfa04ca5874d2f555a5c7e300849da3ea67194244aef98a004c3f65c70442

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