Malicious PDF — malware analysis report

Static analysis result for SHA-256 28e69d97bab4307a…

MALICIOUS

PDF

70.8 KB Created: 2020-11-13 08:45:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: f45362b369eed4e54502ad9c009b5921 SHA-1: ed9217f71042670383c04680fe57aa62f21aef96 SHA-256: 28e69d97bab4307a74f6ea736534e4d06194923a6062c1ed1971de5d4e9954de
156 Risk Score

Malware Insights

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

The PDF document contains numerous external links, with one prominent URL leading to 'trafffi.ru', suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, further supporting this. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classification strongly suggest malicious intent, likely to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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=2006+subaru+forester+workshop+manual PDF link annotation
    • https://liguroxuf.weebly.com/uploads/1/3/4/4/134443360/3387722.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/eda087d2-d7fa-43e2-a2cf-c27c69e5d565/grammar_fundamentals_rmit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ccfb70b-ee73-4ca3-a3c1-05b72753ea52/xuwiwogavijoba.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/basic_concepts_of_astronomy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56832665-36ce-4a06-9445-657ae6b42961/89460913504.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/free_middle_school_band_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/606d5612-e79c-469a-bc97-8323370a5b9a/tekonsha_90195_p3_electronic_brake_control_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07c810f5-783c-458c-9e3d-2e72777af5d6/39359705631.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/cover_letter_for_finance_job.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8eb9abe9-fde2-407b-9647-edb916e948df/linked_arm_templates_azure_devops.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_off0000c867.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC867 5604 bytes
SHA-256: 06b03abafae0661024920e2bc07de28bf781ff6a3f881fabcb7d3ecbd53b95e8
font_01_sfnt_off0000db4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB4A 10820 bytes
SHA-256: 53b2ac559241ffb694f6ff8bee3961944c67b1de405c96b9aeb0114e3d8b3859
font_02_sfnt_off00010030.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10030 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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