Malicious PDF — malware analysis report

Static analysis result for SHA-256 589fc4a9c7150cd7…

MALICIOUS

PDF

176.2 KB Created: 2021-01-12 06:27:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 08ddfe5e8e9cf926e1436d49572fd28f SHA-1: 70c49740a2956451ff30d3229f7aff457cda524c SHA-256: 589fc4a9c7150cd7b0ae730f5f68ebc8f3b5632ca5a40cae370ed55879ea4008
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/123?utm_term=visual+analogue+scale+%2528vas%2529'. This, combined with ML and ClamAV detections, strongly indicates malicious intent. The document body is heavily obfuscated and unreadable, but the presence of embedded URLs and the redirector link suggest a phishing or malware delivery attempt, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://gettraff.ru/123?utm_term=visual+analogue+scale+%2528vas%2529 In PDF document text
    • https://cdn.sqhk.co/fafovewidom/anhgd3p/winner_soccer_evolution_unlocked_all_apk.pdfIn PDF document text
    • https://gomepenet.weebly.com/uploads/1/3/0/8/130874128/1f817cedae079.pdfIn PDF document text
    • https://nukoxifade.weebly.com/uploads/1/3/4/3/134332817/josozogapemil-xikafupe.pdfIn PDF document text
    • https://cdn.sqhk.co/veleviziwew/xLBifWL/53528196104.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvepiwedo/INggPhf/best_smart_charger_for_airsoft.pdfIn PDF document text
    • https://cdn.sqhk.co/lelogusobade/Aiiidhu/keruwab.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/zolerazowubow/patricia_a_guth_elementary_school.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/vit_high_school_table_grove_il.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/64822293923.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/my_bubble_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/nejagin.pdfIn PDF document text
    • https://s3.amazonaws.com/xupimaral/aapka_phone_ringtone.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00025f6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25F6B 5052 bytes
SHA-256: 71816dbeb007a03010de926c2cd9a367ac39e2c02a0b89bb0c2e72b38e2b9c68
font_01_sfnt_off000270cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x270CC 14636 bytes
SHA-256: 901b94b5d28307ec391df560865478fc67ff6ec9102c076134f623bbea907e0c
font_02_sfnt_off00029d25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29D25 16232 bytes
SHA-256: ee0a29113e05e18cc9dd0aa818c1a56c150b8781d6e006ea1e202f9d193b0bc7

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