Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dbf745f9a3e0a0b…

MALICIOUS

PDF

73.2 KB Created: 2020-12-03 00:40:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: aea8b18387636a1b87080bd5a5d72d83 SHA-1: 16ae9367ca0f28abf7207cb9dce0d6cc650a0ee2 SHA-256: 8dbf745f9a3e0a0bba24a0d244b1946c666e3ffccd2485ee430aee7fdf6606fe
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL, https://cctraff.ru/strik?utm_term=pathfinder+druid+animal+companion+character+sheet, is likely used to lure the user to a phishing site or download further malware. ClamAV also detected this file as Pdf.Phishing.Trojan, further supporting its malicious nature.

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
  • 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://cctraff.ru/strik?utm_term=pathfinder+druid+animal+companion+character+sheet In PDF document text
    • https://gorijifezavu.weebly.com/uploads/1/3/4/5/134502749/8175004e0089c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374178/normal_5fad68eb39d5a.pdfIn PDF document text
    • https://fasanubuxa.weebly.com/uploads/1/3/4/7/134733786/fefatodikewi-bimakezefugoken-nudovedazofo-lawor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372735/normal_5fb275d5a5e45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378831/normal_5f9127d13eb03.pdfIn PDF document text
    • https://gukenesiwedik.weebly.com/uploads/1/3/4/7/134735424/7662479.pdfIn PDF document text
    • https://gobumireg.weebly.com/uploads/1/3/1/3/131383916/91377507b.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/a5b79915-d082-461e-ac16-76f0d43dea6e/9569264329.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e761a3d-ab06-4f9f-acf1-864a29adf520/riwekapanan.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbffa571c8c7413142c9acf/t/5fc25fbd9d79364840da85e2/1606574014134/thermodynamics_properties_of_pure_substances_problems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f07afe7b-47f5-4d44-9ce2-8af37f2d7d58/bimejarujezusufusavim.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0feaf0a2757459be36412/t/5fc2f9a07acac6192a22e828/1606613408585/avast_cleanup_service_high_disk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/977bc399-f683-4ec3-a56d-02ea2cd0eeea/2842_flashpaq_superchip.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_off0000e1b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B3 5396 bytes
SHA-256: 8fcef16cbae98d090a5f35216ade1d1270fa94bf169a2cc162bd8ec5e613ee09
font_01_sfnt_off0000f3e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E4 10320 bytes
SHA-256: 5ebefa15243e7f3583908e94f6e877e30be78618223ab81d669f665f7e04ef42

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