Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bf25a4d126e4fb6…

MALICIOUS

PDF

74.3 KB Created: 2020-11-23 18:22:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 918736913ce9a3465238ffdb30df432f SHA-1: 18a1229e36f406c91dc6dfad8a61f4c0abfbcd41 SHA-256: 2bf25a4d126e4fb63cbed14be21a37421e83f72e585183510dd830cf6240c3e4
104 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The presence of a 'download button' heuristic and an embedded URL pointing to 'trafftec.ru' suggests a phishing lure designed to trick users into downloading a secondary payload. The document body, though heavily obfuscated, contains metadata indicating it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafftec.ru/strik?utm_term=tiny+teen+bbc PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368219/normal_5f947e2bee70c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465142/normal_5fb463ab85bed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414486/normal_5fa3d68450ebf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449783/normal_5fa59929376d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382780/normal_5f8d0a83e1a95.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vuxalirudidel/wokukiwiwu.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/65778041549.pdfIn PDF document text
    • https://s3.amazonaws.com/jodabiladezot/32759133764.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/informed_consent_form_template_for_counseling.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/importance_of_balance_sheet_in_healthcare.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/54349787702.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/sales_manager_resume_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/auto_vs_manual_transmission.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dfb9a5a-e058-410c-9ff4-2d9f7ed86470/34720806877.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_off0000e7d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D2 4468 bytes
SHA-256: d731025a7adc823b7857a3d076f3b9846310ddcbec90118b758e622cf17b6cb0
font_01_sfnt_off0000f729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF729 11160 bytes
SHA-256: 79d240f05696f2ee2866244b96de878178fc05ff667d747c9522feec86259a19

Open this report in the interactive analyzer, or submit your own file for analysis.