Malicious PDF — malware analysis report

Static analysis result for SHA-256 fef0f41479346ee5…

MALICIOUS

PDF

67.3 KB Created: 2020-11-18 12:21:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 045268f33584652e5a79ce82a26dc348 SHA-1: 286fbdf10fabdb3d7748aac16d95b906a1550250 SHA-256: fef0f41479346ee541cf9d4b76d18cf61e3db3371e72158ded2f20247d7d9699
96 Risk Score

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 external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffking.ru/123?utm_term=in+the+blink+of+an+eye+murch PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4377647/normal_5fab077bd90b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428069/normal_5fa92befa3bf3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392210/normal_5fa3f10a95289.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411220/normal_5faeb8b243c15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370273/normal_5f88c241903f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492275/normal_5fb3f05b23ef0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366408/normal_5f9777a40ac59.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/retobifulipo/oro_y_plata_montana_flag.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/autodwg_dwg_to_converter_full.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/simple_email_template_for_job_application.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/monstro_the_whale_pinocchio.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/libugonizigugosawabanoz.pdfIn PDF document text
    • https://s3.amazonaws.com/potevip/83391125497.pdfIn PDF document text
    • https://s3.amazonaws.com/farezelof/27647722962.pdfIn PDF document text
    • https://s3.amazonaws.com/tofizo/wage_slip_template.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_off0000c9b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9B7 5188 bytes
SHA-256: ed91c5d7c60290cc3cb6b2de55928de6054a18e70ed276d2a8655426bfb5cb87
font_01_sfnt_off0000db41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB41 10904 bytes
SHA-256: 5529ad804793d6384894de2cfc2d05779d221c9a528487d138e191f0dd6d647b