Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b0c81a62925386d…

MALICIOUS

PDF

70.4 KB Created: 2020-12-08 19:22:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 73c284d4fa4ab452a40578e6c7af262b SHA-1: 10e9218a3f7aa248a8e866eb339070d25a16e9b1 SHA-256: 6b0c81a62925386df211026eb6b617f2e579ddb56fec361c9211590539c67503
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded external links, with one pointing to 'trafffi.ru', suggesting a phishing or link-farming attempt. The presence of embedded URLs and the nature of the heuristics indicate that this file is designed to redirect users to malicious or deceptive websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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/123?utm_term=soft+shackle+edwards+knot PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365545/normal_5f8716e2661b9.pdfIn PDF document text
    • https://vimiwegom.weebly.com/uploads/1/3/0/7/130775837/badifakewilib_woginasovobixod_safaparofokoze_simano.pdfIn PDF document text
    • https://pixijitawe.weebly.com/uploads/1/3/4/5/134593468/e16adb.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://s3.amazonaws.com/wilugugo/giberakuvasufoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5cf7d84-c5bb-4435-8a3e-2770db7ad03f/strike_force_heroes_2_unblocked_76_weebly.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/preschool_registration_for_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c1e3751-4ba0-42c7-8687-0112c45756a6/nelopijofajidet.pdfIn PDF document text
    • https://s3.amazonaws.com/nevowimo/wibajikokegosawevefijali.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4fe464571256543146cf/1606373348923/68220503573.pdfIn PDF document text
    • https://s3.amazonaws.com/jufowokedunod/forcepoint_ngfw_datasheet.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_off0000ca04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA04 5108 bytes
SHA-256: 4f0df7f69ba1f450af3bb2981312328ccd6dcf29739054126d887b3f4c9bf04b
font_01_sfnt_off0000db5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB5F 10480 bytes
SHA-256: ae1e533e8cc95d43c1fe4c39e2cc7c2f6ad17b7d08e25eb4b261ac19e92a231c
font_02_sfnt_off0000ff29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF29 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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