Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c753b4e87f6dcbb…

MALICIOUS

PDF

185.5 KB Created: 2020-11-10 07:05:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 053a67ab9e1d186a5ef2ea96d7cae67c SHA-1: d640ac616180cabdf3d62e5cdb967834241b3852 SHA-256: 6c753b4e87f6dcbb7ebf78e3aec7171ebbf264ac1ee3c97ab720399ffc6da13e
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'trafffi.ru', which is likely part of a phishing or malware distribution scheme. Although no explicit scripts were extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, possibly for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafffi.ru/123?keyword=paloma+valley+high+school+njrotc
    • https://sizukejagu.weebly.com/uploads/1/3/2/6/132681884/punibomade.pdf
    • https://lalazifesulalo.weebly.com/uploads/1/3/4/5/134502535/bexukop_vulajapovojej.pdf
    • https://cdn-cms.f-static.net/uploads/4380858/normal_5f9b172de4967.pdf
    • https://cdn-cms.f-static.net/uploads/4390643/normal_5fa00cc536503.pdf
    • https://basuxebuj.weebly.com/uploads/1/3/1/3/131379820/6fc6d6e9ca3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/2e83e6ac-e5b6-43bc-b561-bc61f505f46a/medical_officer_job_description.pdf
    • https://uploads.strikinglycdn.com/files/e5cd4865-6f6f-4a41-a8c2-cf974d814d21/18272443764.pdf
    • https://uploads.strikinglycdn.com/files/8171baab-7146-48f3-b985-36e622480da4/kasoravoserovivamu.pdf
    • https://uploads.strikinglycdn.com/files/e31e574c-7b2a-471f-a5ed-e0b62e314fb3/63368712664.pdf
    • https://uploads.strikinglycdn.com/files/5b353dc3-9ae2-4999-aef9-0180e53796f5/34518803165.pdf
    • https://uploads.strikinglycdn.com/files/6e07b601-e283-4f52-bc58-cf737d9444d2/43174017170.pdf
    • https://uploads.strikinglycdn.com/files/9189b95e-96e1-4a6d-a9ce-dd62de6ad6ea/85375698005.pdf
    • https://uploads.strikinglycdn.com/files/6e30aca9-4159-41fe-838a-5b7cfafe6b43/pivinebuniwife.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0002abf4.bin
229b6660b7b9a03cbeb79e039ad0642f436c2b13ef2ff2d54336cdf71a71da41
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2ABF4 24924 bytes
font_00_sfnt_off00027224.bin
63ac020669abdcdb410b5b71785ac01770fc4b95aec751b821ec05507dab8406
pdf-font-stream PDF embedded font (sfnt) at offset 0x27224 5452 bytes
font_01_sfnt_off0002849b.bin
e0266394f54f7a34c7369289cc7e4501184e88d172c9aba3a554d78a8d7fce0e
pdf-font-stream PDF embedded font (sfnt) at offset 0x2849B 11500 bytes