Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f24d4462ae212cb…

MALICIOUS

PDF

65.2 KB Created: 2020-12-21 23:00:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 976eca19b39cfbd906364ed6d623d6dd SHA-1: df91a89f4172b9aed0c766db64de9c0818da35c5 SHA-256: 0f24d4462ae212cbc87f02d525727831bf325894f8af5565b8a1a02ef13d7d48
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 0.9998

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://trafffe.ru/123?utm_term=sri2+compound+name PDF link annotation
    • https://pafetinavip.weebly.com/uploads/1/3/4/8/134868030/9274939.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393790/normal_5fa01cf522f24.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/15383ef3-06ce-45bf-b579-a74d033c662b/94370086414.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f63ca984-fbe3-46a5-a09b-1f09ad517658/cane_creek_massacre.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf620c173fb5383b9a1b9b/1606377997147/standing_rock_temperature.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/986063bd-796d-4455-855e-6e39aff7511a/tangerine_dress_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ab003ac-51a9-4b18-ba07-bc2c89a699d5/85247810817.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17285744-1a02-44b6-9fc5-53c158243a7b/how_to_trim_a_beard_with_scissors_and_comb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1fd788f-45ee-4b04-bd7a-9a60183cebac/larodu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/384fc70a-e56b-48b1-bee4-61880d6d2157/iowa_high_school_softball_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dee4ec5a-c12f-4476-8c8d-aa88673f99d8/guia_exani_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b36228a-6bf8-44de-89e0-536d5aedbca9/it_cosmetics_bye_bye_foundation_sephora.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_off0000c359.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC359 5244 bytes
SHA-256: a10420a2dc7280bffe76baf8ace1d0c11d3384a203fe584cc808d9fbbd2b90c0
font_01_sfnt_off0000d516.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD516 10416 bytes
SHA-256: 15fa540bbacdd17c4b66e0c5fd8bd96eb799fe8bb33f613cd6c36fb57c56602c

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