Malicious PDF — malware analysis report

Static analysis result for SHA-256 b452e0ea342720a6…

MALICIOUS

PDF

64.5 KB Created: 2020-11-30 05:42:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: dcbccf860b95fe85fa50e7de5326f984 SHA-1: a86cff5d4db75069a18912d6ab61dc6d131563d5 SHA-256: b452e0ea342720a6d369dba0069e3915e1753c0e62d14fe40882e60946096d36
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics, including ClamAV and an ML classifier, indicating a phishing or malicious link distribution scheme. The PDF contains a large number of embedded external links, with the primary suspicious URL being https://traffnew.ru/strik. The presence of numerous links suggests an attempt to manipulate search engine results or direct users to malicious content. No scripts were extracted, but the PDF structure itself facilitates the attack.

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
  • 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.
  • 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://traffnew.ru/strik?utm_term=sun+bum+shampoo+blonde PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4469358/normal_5fc3f145d04f3.pdfIn PDF document text
    • https://pelimabogex.weebly.com/uploads/1/3/4/6/134685965/45192e42ec83ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383921/normal_5f8e66c82e7bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370985/normal_5f9033bda8fd1.pdfIn PDF document text
    • https://jopalezaleloloj.weebly.com/uploads/1/3/1/3/131380469/6285532.pdfIn PDF document text
    • https://lumodafudewose.weebly.com/uploads/1/3/4/4/134480169/0af0f1c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365619/normal_5f8c0f46e8007.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501028/normal_5fc0f7c006ddc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408187/normal_5f95f777bceb9.pdfIn PDF document text
    • https://pidadilux.weebly.com/uploads/1/3/4/6/134666204/jawemepuwiwifisuluf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/1af0bc79-f9ce-4a1d-818f-2f982b2a6350/selufamakerisevowilojipu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3642b53e-0024-4b29-a29e-aacc8cbb3e28/80283237781.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ae10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE10 5100 bytes
SHA-256: c0228c11272704b4bec6d9f2251385cb7b5fefd2084bbb619189b386dbbca806
font_01_sfnt_off0000bf1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF1F 11736 bytes
SHA-256: fd3417f8f1c14a04badff3ed254bfeab01fdd0a8d791d0da5a84dfce530d33d7
font_02_sfnt_off0000e62e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE62E 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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