Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3ec49b37e21084b…

MALICIOUS

PDF

116.9 KB Created: 2021-03-02 04:43:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 8adb26c05aa2756ae03ff84102ec42c1 SHA-1: a220f837d3e07958cfa3f65d42f1384268c038e6 SHA-256: a3ec49b37e21084b8233daea0d02efbe17bbda5f25150b2b2c8a1cca09bfa7de
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains embedded URLs, with the primary suspicious URL being https://vilenefex.ru/strik?utm_term=how+to+read+velocity+graphs, suggesting a phishing or redirection attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing lure, likely intended to direct users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://vilenefex.ru/strik?utm_term=how+to+read+velocity+graphs PDF link annotation
    • https://cdn.sqhk.co/tosuwukiwate/rT0Higl/princess_dress_up_and_makeover_games.pdfIn PDF document text
    • https://cdn.sqhk.co/dikapagoloza/dhfggLR/tojis.pdfIn PDF document text
    • https://cdn.sqhk.co/zoxowowi/ftKvkjd/79823074862.pdfIn PDF document text
    • http://insurancesouk.com/sarovoxasodugelage5ro8r.pdfIn PDF document text
    • https://cdn.sqhk.co/sozasusu/uhhdZid/93742080699.pdfIn PDF document text
    • https://cdn.sqhk.co/jigavozef/oijjbSK/video_game_ringtones.pdfIn PDF document text
    • https://cdn.sqhk.co/nebinefis/UEzgdck/faith_and_fringe_boutique.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/podawakumepewez/36426522068.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/dozaridesegozedutegujo.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/off_white_chunky_platform_sandals.pdfIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/1217671610.pdfIn PDF document text
    • http://devepovamijube.epizy.com/coloured_rice_paper_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/vokaburevikewativopokizu.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/arqiva_annual_report.pdfIn PDF document text
    • http://masekafisixovok.epizy.com/battledogs_hack_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/95378586397.pdfIn PDF document text
    • https://s3.amazonaws.com/likadojivivofu/canadian_citizenship_study_questions_answers.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_off00018a75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18A75 5552 bytes
SHA-256: db4f87c3a822d8fd195316ef33420b62ed9568ec61b07e109bddf9693cb5760f
font_01_sfnt_off00019d69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19D69 12048 bytes
SHA-256: 4051e34f518cefb4d7cff4229b6d3f16bde2d8a854d43e4ec4b6cffe27da993a

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