Malicious PDF — malware analysis report

Static analysis result for SHA-256 62308276fcc3399e…

MALICIOUS

PDF

77.9 KB Created: 2020-11-16 18:17:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 909a75dabd1fe37c7df493e2f1914348 SHA-1: b840b7a167cc2842332485b2c8b3d68cdbe50012 SHA-256: 62308276fcc3399e023f624dbce4401db7f944d74885cf1fb6fa3a02e263bf96
154 Risk Score
Tags
free-cdn-ebook-manual-lure

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=dr+seuss+clip+art+free+images'. The ML classifier also flagged this PDF with a high score, and ClamAV detected it as 'Pdf.Phishing.Trojan'. The embedded document body text, though heavily obfuscated, appears to be a lure related to 'Dr seuss clip art free images', suggesting a phishing or social engineering attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=dr+seuss+clip+art+free+images In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368731/normal_5f8fa703c24a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393359/normal_5f9728e5ce554.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366007/normal_5fa09dad5a043.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385863/normal_5fa06cc97112c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/86a54757-bb2a-4016-adaf-072ee913f21f/vodugepetejukarurinezov.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/wamefom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a2add8e-fe78-4a16-af6c-62d7b32c1bf4/57377171462.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c63b3e6c-5616-407b-b938-73803c74db4c/96287435718.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cb804e9-e7a0-49ae-97d4-8a97ed89c746/niwed.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/air_raid_basketball_controls_in_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9920fab-5407-4bc3-b019-3e9da8f5e537/16890937677.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abee8039-e85a-4424-8bbf-f65d98da5e1c/mandala_con_operaciones_para_colorear.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/288d42fe-c0c9-407f-a372-2434be214a25/vimepojisunemunebejabal.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d18c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD18C 5000 bytes
SHA-256: 13d54d626f523ce2364a83127c578dbbabcdd47cfba585ed17604f4d757a33b6
font_01_sfnt_off0000e29d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29D 10268 bytes
SHA-256: d1ab8d8258094e27b92764a41d0af4fe9eb87057ea090c7f7611a71bd75b66af
font_02_sfnt_off000105bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105BF 16448 bytes
SHA-256: f72c050da1b9d2b252b60d923d48b873e3167586161433f4ccd489531a5eaa86
font_03_sfnt_off00011c16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C16 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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