Malicious PDF — malware analysis report

Static analysis result for SHA-256 2133377573e7d93c…

MALICIOUS

PDF

68.4 KB Created: 2020-11-13 00:58:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 34f02bd38ed5bb774fb748e905214a4a SHA-1: db06abeead35bcd0afe00e6a65b20feb98131a21 SHA-256: 2133377573e7d93caf9e2d8e870bff61c27cec2df0317654247851c76d69278d
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafficel.ru/strik?utm_term=de+decimal+a+hexadecimal PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374521/normal_5f8a005a4234a.pdfIn PDF document text
    • https://lonunibulitog.weebly.com/uploads/1/3/4/4/134498578/761038.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420451/normal_5f9e0636aff54.pdfIn PDF document text
    • https://jesokalatozu.weebly.com/uploads/1/3/4/5/134591365/witizof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403938/normal_5f988ff2ea480.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365608/normal_5f8cc4a41d98c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393911/normal_5f93ad360167d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5a3835d-8338-4e54-a587-99e829c80081/schaums_outline_of_electromagnetics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e84dc862-e78a-4185-8619-f0bb88de626b/92386847113.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/mega_man_3_weakness_order.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac4fe8b8-5caf-4662-b78d-b5b679b94291/descargar_imagenes_gratis_de_rosas_e.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09e9d068-c6b8-4c65-88df-4d1b1e67ae56/68279496836.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD224 4972 bytes
SHA-256: 8ff63d6c0c1b2ba75c69b27b6dc0b464c6c09173e53cebc737605c24651733c5
font_01_sfnt_off0000e2e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E9 10256 bytes
SHA-256: 5a5b51605b6aa825d9f6b8771ff77d19228c0d55a388deb49124d0a29b0d5ca1

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