Malicious PDF — malware analysis report

Static analysis result for SHA-256 622c651b0acb1ac3…

MALICIOUS

PDF

69.8 KB Created: 2020-12-17 06:46:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: fa845f390bf5fbcd0dbae954631732d9 SHA-1: 42f4429c9fdd7e200b0bef31b7405a58b8286dcf SHA-256: 622c651b0acb1ac30352347c09efe603a5da0b02206ef3d9bc065d55b855da2b
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying a 'link farm' intended to direct users to various external PDFs. The primary suspicious URL, 'https://trafftec.ru/aws?utm_term=meilleur+livre+guide+touristique+rome', suggests a lure related to travel guides, likely a phishing pretext. The ClamAV detection and ML classifier strongly indicate malicious intent, consistent with a phishing or content-luring attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafftec.ru/aws?utm_term=meilleur+livre+guide+touristique+rome PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4489429/normal_5fb2f521878f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393637/normal_5fc1c65c88a21.pdfIn PDF document text
    • https://wejakoguxi.weebly.com/uploads/1/3/4/3/134324676/4275691.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466664/normal_5fc94f5271979.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413236/normal_5f9cd826a92ee.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/5fc5919de2fce462bcaba119/t/5fcafb94393ce473562b7280/1607138197736/nyc_commuter_benefits_parking.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/261d2588-7e1d-4bbc-a2d8-871724b1db5d/66086444162.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3bff298-6026-41f0-ab5c-7ff5dd5129f6/tetris_unblocked_mj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53e59435-7082-465c-a986-39e305825600/y_kant_tori_read_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe14134e98326c02d7e2f7/1606292500568/7787876155.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d38fda56-d42b-4a5b-afd3-99795677145b/vevuxisenaxeniwexopuba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/357e2ab8-7f9d-4da6-b065-5ae2a73062b7/sukagakerijel.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_off0000d27e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD27E 5128 bytes
SHA-256: d183c7366a7aa8f6976e45aac095599020265054a540c90dfb4c29b64ec9cdff
font_01_sfnt_off0000e3e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E4 11696 bytes
SHA-256: 84c47115ad3f63f969b40ea2b4feb5f1cf627c49bc48c964d0ed270514f3182a

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