Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d8ec1850b828282…

MALICIOUS

PDF

70.8 KB Created: 2020-11-11 21:41:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 50c5e545ba39c1cb70d17922f2c8a68a SHA-1: 16b35593d3d6f10844dc6f865ade23b55c4dd711 SHA-256: 2d8ec1850b8282823aa5d6db6684cf6b925677c252fa8be6e839b1cc518e4bdd
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or link farm attack. It contains numerous external links, including one to 'trafffi.ru', suggesting an attempt to redirect users to potentially harmful websites. The presence of embedded JavaScript, though not fully analyzed due to obfuscation, likely facilitates the redirection or further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://trafffi.ru/strik?utm_term=mantendo+a+feira PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4422390/normal_5f9b77369ea8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464082/normal_5fa9ce7c7f4fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366958/normal_5f8b34e2adecd.pdfIn PDF document text
    • https://voteriboxovoviv.weebly.com/uploads/1/3/4/3/134352377/5502004.pdfIn PDF document text
    • https://junoxavod.weebly.com/uploads/1/3/1/3/131384771/1b88e7ad75652e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423471/normal_5f9d93c61c8c2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/57861054555.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8d702dd-014d-44a3-a4f5-ddb625df1e5e/delanamamumilunemenu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26135da2-71cf-4f4c-b8c0-a4a62d1b653d/ccs_c_compiler_crack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c927ae20-6381-456b-a12c-f638107f7d4c/1639572673.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_off0000d4dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4DD 4696 bytes
SHA-256: abe23bd122c2d84a5e8d4c933d722ad670c5e16e28aa2ccf6c8b953970f4aa4f
font_01_sfnt_off0000e4f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F3 13488 bytes
SHA-256: 07575368778043ddd300c52533eddd541e2580c4a5bf2fcbdd79ed42d97543b9