Malicious PDF — malware analysis report

Static analysis result for SHA-256 9db6beb985fd0eca…

MALICIOUS

PDF

69.6 KB Created: 2020-11-29 06:07:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 86febcd9a01e3e1912d9087465aa46b7 SHA-1: 80a1e7423e13bb13af88b0dede16d98cf91bc693 SHA-256: 9db6beb985fd0eca85748b426ad72e1cc5321fa76cd7e76111efc9e921846f69
154 Risk Score

Malware Insights

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

The PDF contains an embedded URL that points to a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or to serve a second-stage payload. No scripts were extracted, but the presence of a malicious URL is a high-confidence indicator of compromise.

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://ggtraff.ru/strik?utm_term=cross+cultural+competence+in+education In PDF document text
    • https://cdn-cms.f-static.net/uploads/4446399/normal_5faf7ce5e0594.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381756/normal_5f9e944d253f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495399/normal_5fc31bc9e003f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407318/normal_5fa7115f51f16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411480/normal_5fa15f3ad50a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369158/normal_5f885d08c923e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370053/normal_5f8f87cf571b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408190/normal_5f955a507a0ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461746/normal_5fb42189478d2.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/33701d8f-12d2-46d0-8857-c087e8488077/dowobij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6be1253a-a5a1-4215-880a-c15ddd270d61/japosukewunupabejasara.pdfIn PDF document text
    • https://s3.amazonaws.com/jufowokedunod/sepekewepedu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46d03c01-74dd-4b07-84af-c60eea316087/elementary_differential_equations_11th_edition_by_boyce_diprima_and_meade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98496307-4465-48da-8b94-7edb1828cb41/51102114349.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_off0000d8af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8AF 5124 bytes
SHA-256: c383a6aa13e8756d0db8cd0b11cd11d6d9f59100d49bb82984614d6ba42dae60
font_01_sfnt_off0000e9fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FD 9312 bytes
SHA-256: 1f9376c11885c3b79d0755913b5459207534be2e83dcbb4c6f3578bb68b4b033

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