Malicious PDF — malware analysis report

Static analysis result for SHA-256 9946d47b05d315bd…

MALICIOUS

PDF

68.4 KB Created: 2020-12-20 06:55:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 6809166e8ec977acf8de3582a51a866c SHA-1: 826fb16bbdbe7279387768e930fb6a25a2938163 SHA-256: 9946d47b05d315bda1fa3057753992ab33b21b4a8941cb4135725337331a086c
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. The document body itself is heavily obfuscated and appears to contain metadata rather than user-facing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/strik?utm_term=digital+advertising+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4385202/normal_5fbdf9717e766.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413112/normal_5f9704c9b9f7a.pdfIn PDF document text
    • https://kumenesasewoton.weebly.com/uploads/1/3/4/7/134773405/3169154.pdfIn PDF document text
    • https://wojuguzibuliru.weebly.com/uploads/1/3/4/8/134896427/9808854.pdfIn PDF document text
    • https://vosaxiwajikox.weebly.com/uploads/1/3/0/9/130969878/8a74eabbae29.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/ee00834a-b0f0-4dde-a99d-41c170da8c3c/nigodozegivadez.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/cofactor_of_a_2x2_matrix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e084396b-bc0b-4ebc-8d80-17802a9ac9b0/nudidamelaromuxajawaxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5600c0a5-78c8-4d2e-b2b6-c6f8a958b024/iowa_cubs_schedule_2019_roster.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/investing_in_canada_plan_progress_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3a29499-a843-437f-a056-4ebbe4e4117a/87411766536.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a2d1983-7456-45fe-bf35-8decad77d677/raxisajapemolabe.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_off0000ce2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE2C 5268 bytes
SHA-256: 6af8c96d0379abd6805a8d559e8d7e6a9582ae6376d9c0834f24129fdf4ed276
font_01_sfnt_off0000e035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE035 10860 bytes
SHA-256: fecfda4b10b4de72e57931d1b8a7cbca46b4e2f8ebc536649d6bdc964e04b27c

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