Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a00826d37b46ed9…

MALICIOUS

PDF

64.8 KB Created: 2020-12-09 02:36:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 587b905d0b305f46d9f2be113951bfc2 SHA-1: 773b5f99ed819f8b071e1dc63cd893c4f7d1f164 SHA-256: 1a00826d37b46ed9a246255c176abce6d01d4e5c9c8c233f487da8b51efd4a95
156 Risk Score

Malware Insights

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

The PDF file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or link farm attack. It contains an embedded URI pointing to 'trafffe.ru', suggesting an attempt to redirect users to a malicious site under the guise of a 'Luigi's pizza menu'. The PDF also contains a link farm heuristic, indicating a large number of external links, with one pointing to a legitimate-looking but potentially compromised Squarespace URL.

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://trafffe.ru/strik?utm_term=luigi%2527s+pizza+menu+san+diego PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366017/normal_5f8708623b1e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367005/normal_5f9cdd4177a79.pdfIn PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/wedare.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/5fbce344be7cfc36344e8aaf/t/5fbf4a313c6ccf69f354978e/1606371889856/wakfu_class_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe3f21f8cdb769c6af1905/1606303522123/15623260169.pdfIn PDF document text
    • https://s3.amazonaws.com/takebemanijewok/application_letter_format_for_teaching_in_nigeria.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5fc7cb3e0f5771471221/1606377416161/rawuzopibozarulode.pdfIn PDF document text
    • https://s3.amazonaws.com/tiniruru/daregeduxato.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94c78d68-0233-4fa3-9d33-30d045149500/rotezikelinivotegapepep.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2d1048139af037651a389/t/5fcd665a260a660a6bee1d51/1607296605363/43968357158.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/duzifexajepe.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_off0000c226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC226 5176 bytes
SHA-256: 53c96c76248180e8dc0230c6dc0b190d1a34065d91ea5fb9ac3ce6ce301b5794
font_01_sfnt_off0000d3cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3CD 10188 bytes
SHA-256: 381a4ecc8d4d75fd0bfb49e6f7fe2ebbdcb0489e56f9aaf67bdd89af02212318

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