Malicious PDF — malware analysis report

Static analysis result for SHA-256 65c6efe6b93ca801…

MALICIOUS

PDF

66.9 KB Created: 2020-11-26 02:39:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 8debc76cabbb65bd988e8469d04d9f5f SHA-1: a8049a40d6338f7185c6a5a97f4af97f652dffc4 SHA-256: 65c6efe6b93ca8017951f756d334e5e461ea3f6d6f203b4d7e05275a2f36a9f9
214 Risk Score

Malware Insights

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

This PDF file contains multiple embedded links, including one pointing to 'traffine.ru', which is flagged as a malicious redirector. The document body, though heavily obfuscated, suggests a lure related to Google Docs orientation, likely to trick users into clicking the malicious links. The presence of numerous external PDF links further indicates a link farm or phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffine.ru/123?utm_term=google+docs+landscape+orientation In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379032/normal_5f9929ef702af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366313/normal_5f8c8d72da0d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393362/normal_5fb9e70d7baca.pdfIn PDF document text
    • https://jubunukaf.weebly.com/uploads/1/3/1/4/131483214/8710936.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413469/normal_5fac198a4f64c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366042/normal_5f95642a54223.pdfIn PDF document text
    • https://gobumireg.weebly.com/uploads/1/3/1/3/131383916/f3863fc95c.pdfIn PDF document text
    • https://jigulukeduza.weebly.com/uploads/1/3/4/5/134508725/6842788.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/posufij/snuzpod_bedside_crib_sheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48c279ce-230e-4592-acdf-696d901e94fc/bijalumasobiterusuka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ffe21c9-55d5-4a57-a82e-c3238c3d393d/50984715884.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_off0000c8cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8CD 5272 bytes
SHA-256: 3b8adfc126cb71e10bf5a7faa5cdc55944a5b488ea632f368d951a4e1d079cf9
font_01_sfnt_off0000dad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD0 10512 bytes
SHA-256: 502b63d02df7281aacbf79286306a02d9e413e6405b574169ed8f312b48c7cbe

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