Malicious PDF — malware analysis report

Static analysis result for SHA-256 c52156261415eabd…

MALICIOUS

PDF

66.8 KB Created: 2020-11-18 21:19:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 340810c69a0effbc24878df06e039057 SHA-1: 3104c7c96823d4b78764b82347a90af4424bd84b SHA-256: c52156261415eabddd4d1c8b7f749437efb460704b54e346c42d19276c1cb11e
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, traffking.ru, which is likely used to host or redirect to a malicious payload. The ClamAV detection and ML classifier strongly indicate malicious intent, consistent with a phishing or trojan delivery mechanism. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to trick the user into downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffking.ru/strik?utm_term=daz+loader+windows+7+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375690/normal_5f8c0cbc8e331.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415974/normal_5f9fc40747da4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481275/normal_5fb5430c6cfd2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365624/normal_5f874f2c9933a.pdfIn PDF document text
    • https://jurexufibemoso.weebly.com/uploads/1/3/4/3/134310147/simarififawipuz.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/7a89d32d-f224-4d75-b1f4-1d1003bcbfa4/john_deere_300_e_loader_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ecc7a5a-7b50-4dbf-a539-e30b31bbb182/76591234729.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ddf96ea-c353-4a88-9108-1c1de58d1dee/31228577341.pdfIn PDF document text
    • https://s3.amazonaws.com/suzitivasekoga/how_long_does_it_take_for_a_background_check_to_come_back_for_a_house.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f34a5542-53e8-4ab3-83bf-a47c4d8e2485/jobidigun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3a85630-2288-4b2e-bf75-cc689dba194e/rsum_dtaill_la_princesse_de_mont.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/fufazedarera.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_off0000ca5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA5E 5040 bytes
SHA-256: 317ffac6dfa4e7eb61019899b6c145cc93d17eef4dded3c89bb228d9cc567266
font_01_sfnt_off0000dbb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB7 10348 bytes
SHA-256: b7aaea493d0f0438ca6b5b49654c0ffd98d1aaf118a28255fef987908bd3d55a