Malicious PDF — malware analysis report

Static analysis result for SHA-256 2495411574ebf2b6…

MALICIOUS

PDF

66.3 KB Created: 2020-12-18 04:48:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 46dfeabb0888a58ab35bd7d43576d477 SHA-1: eb32921a835f895c34b7dc18e0b69957f086e8a6 SHA-256: 2495411574ebf2b64c3ff5407801ca62e6600ccbae1520952ff0f99562ab8cf8
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/strik?utm_term=dust+in+the+wind+chords+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408721/normal_5f95b538b5458.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366632/normal_5fc920340c36b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377400/normal_5fcd5df027cef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369911/normal_5fcc198044c06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387410/normal_5f93022c997cf.pdfIn PDF document text
    • https://rogakaroguw.weebly.com/uploads/1/3/4/5/134517982/8757932.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/5fbf4fd83485235c86bcf03c/1606373337008/kuzeruzim.pdfIn PDF document text
    • https://s3.amazonaws.com/remufuzu/whatsapp_video_love_status.pdfIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/credit_report_experian_or_equifax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4bb308b-e385-483a-aee4-949f0bf8cd94/73325520535.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf6632cb3e0f5771478d2d/1606379059862/74407029363.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/rafaviw.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/bomgar_representative_console_32_bit.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dac460f2895dc1e79d89/t/5fcfc75c657f2d3dbcf0f4e8/1607452511463/twist_ball_edm_rush_apk.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_off0000c685.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC685 5092 bytes
SHA-256: c910f3d39349d47e0ece30e91a44fa6e0ce69f66e92f0f9f537baa502d7df6e6
font_01_sfnt_off0000d7f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7F2 10812 bytes
SHA-256: f67b58bc2fe77652c33a45769c6eaea0914849f438ed4420bdc336126b395461

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