Malicious PDF — malware analysis report

Static analysis result for SHA-256 59c520ed472e754f…

MALICIOUS

PDF

65.2 KB Created: 2020-12-17 11:54:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 37629e478f75f50c915b13bdfdf93e35 SHA-1: 78afa71ebc8ffab21a9ba1c7d0d0deb1b00a7787 SHA-256: 59c520ed472e754f94b2ff034dffa3e80bf4fc202af1bea7a4503498218be1be
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating high maliciousness. It contains a large number of external links, with one prominent URL pointing to 'traffset.ru', suggesting a phishing or malware distribution campaign. The presence of embedded URLs and the PDF structure indicate an attempt to redirect users to potentially harmful content.

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
  • 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://traffset.ru/123?utm_term=gold+soundz+pavement PDF link annotation
    • https://tenasusuboziwid.weebly.com/uploads/1/3/4/3/134349012/fidigezaxera.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365638/normal_5fb267fbf0079.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425921/normal_5fd7df90a89b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366007/normal_5f9cc6e499344.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386354/normal_5f8f4e0e74a0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383149/normal_5f8e79b0efda6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393644/normal_5f9fa9a31c7a4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc5d04840f1034a5cca8d9f/t/5fd7208f164d0f203c94cd27/1607934096300/clasificacion_de_los_antibioticos.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc726861c59a74bd98f103d/t/5fce0c43c00f007cea0eb3bc/1607339079364/fold_up_bed_walmart.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e0febe9b6939510aa6a3/t/5fc1679ca97599144e2c3f12/1606510493202/59983577730.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5303b8ef7301f8b2cf6bd/t/5fd6659a72b1137fa9767af9/1607886235272/skype_offline_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/protein_bar_nutrition_information.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc799c9a4492a057e246fe7/t/5fd16c46871f8c6e59503025/1607560263851/rarimosirikesekisakebifi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc28a899698b02c7f2b0c7e/t/5fc3b311cb3e0f5771c0fbef/1606660883297/vowazumazo.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_off0000c07c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC07C 5152 bytes
SHA-256: fda7df9c48e49d440e3022b37a6c81a45c1d3ff7cc194b9dd3671de78843856f
font_01_sfnt_off0000d201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD201 11748 bytes
SHA-256: 32f1875ab0a2c27aa987e555a61ed9e21b87e9e725f0a8295dd314811ad33c20

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