Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0e3e3b741061684…

MALICIOUS

PDF

66.3 KB Created: 2020-12-11 15:37:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 7969d487a816d3c0466104d5b41c9746 SHA-1: d02bcf114b5b0e309fc9f5d4019f65ef30bf9cae SHA-256: c0e3e3b741061684ba602f9164c43f061314f5c5f4db5e464aacc752e5d4c260
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting an attempt to drive traffic to malicious sites. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The presence of embedded URLs and the overall structure indicate a malicious document designed to redirect users to potentially harmful content.

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://trafficel.ru/strik?utm_term=another+word+for+actively+engaged PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365583/normal_5fb56b610c150.pdfIn PDF document text
    • https://pafetinavip.weebly.com/uploads/1/3/4/8/134868030/melemudupux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476152/normal_5fbceccce997f.pdfIn PDF document text
    • https://saritubix.weebly.com/uploads/1/3/4/5/134507132/9809335.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/b7fe2ef6-0db5-4e44-872f-674a4b05e1f8/grave_encounters_1_full_movie_in_hin.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f0cad49dd12447345200/t/5fd0db96ef76c20f2d53fa43/1607523222266/31446621822.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/72665591820.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/327b223f-6dfa-44d7-af02-db4738042297/57257787881.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57806006-2092-461a-a5c3-ddf12a176e18/91210676252.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2dc4a4db-61f3-4884-ae75-1bcac65579fc/51788520974.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7542fe47-c852-4ab9-8480-9c5295cb52a6/17894237101.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe3c84fa04221c71ec48cf/1606302853076/retractable_fountain_pen_price.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/desh_bhakti_geet_karna_hai.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdb70b42-b148-4189-bb13-f5cdbc0fb3ae/8305707023.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_off0000c572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC572 5348 bytes
SHA-256: 95c61cdaf1ee163c43b638412d0ecd076c410994ebc358cf394dba4e0a52fb96
font_01_sfnt_off0000d7be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7BE 10972 bytes
SHA-256: 215f09da67b63204444c9bde358af8064967adcad0eef8b2172ff14e15536140

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