Malicious PDF — malware analysis report

Static analysis result for SHA-256 49302537e4fbcc2a…

MALICIOUS

PDF

58.7 KB Created: 2020-12-22 17:27:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ebd0b7692309f0335e3f9165ef0f8084 SHA-1: 676e729c2b07035ddea1d2d7f82bc7277efd4d12 SHA-256: 49302537e4fbcc2a5aeb6185147df83e6c34d2a4e7991c50842617a9a745d78e
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. An external URI pointing to 'trafficel.ru' was extracted, suggesting a phishing or malware distribution lure. The presence of embedded URLs and the overall detection score strongly suggest this PDF is part of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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://trafficel.ru/123?utm_term=cornflake+chicken+tenders+fried
    • https://static.s123-cdn-static.com/uploads/4413567/normal_5fc42b111a82d.pdf
    • https://cdn-cms.f-static.net/uploads/4416322/normal_5fb36109edba9.pdf
    • https://cdn-cms.f-static.net/uploads/4383450/normal_5f8dfc4b24b00.pdf
    • https://cdn-cms.f-static.net/uploads/4450440/normal_5fae2ef8580e0.pdf
    • https://static.s123-cdn-static.com/uploads/4418755/normal_5fce76f93e424.pdf
    • https://cdn-cms.f-static.net/uploads/4492574/normal_5faa053aaec21.pdf
    • https://cdn-cms.f-static.net/uploads/4384484/normal_5fd0fa4f1fbf9.pdf
    • https://cdn-cms.f-static.net/uploads/4376379/normal_5fb72f47617a5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc4e9c47d0c8f249d5a9be7/t/5fc7f0ca8fd22f2eb9ef3d71/1606938827964/12617998015.pdf
    • https://static1.squarespace.com/static/5fc0bb2c88c99b6d37a6398e/t/5fc8665fb74dd54858d8035f/1606968927904/firefighter_skate_park.pdf
    • https://static1.squarespace.com/static/5fc2d321f9866f3fd2e0c591/t/5fc4ec5d9ee0f32b87ee4535/1606741086013/lixinusadojemuvogemafo.pdf
    • https://s3.amazonaws.com/wenobagupexekap/27870612200.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ac9c.bin
c5a3964a0678da34530f70ad84ab62faadef3f8d31f62d9e6a5b4623ba34b0bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC9C 5080 bytes
font_01_sfnt_off0000bdd6.bin
2672246a1b98f94cef19e09ebb10d0bec21fe6b49e0a8fcf693dff62a6041b3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBDD6 9428 bytes

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