Malicious PDF — malware analysis report

Static analysis result for SHA-256 db2373cd59979b56…

MALICIOUS

PDF

79.8 KB Created: 2021-01-01 20:12:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 03ae47695bee0e75086e0d22aa2a03dc SHA-1: 9cef3118090c2b43c6271aa815df8b73bfb52166 SHA-256: db2373cd59979b56ca4bfb666e4a33f0038a727a26ff712aee962a8b6979d348
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://cctraff.ru/strik?utm_term=pick+me+up+meaning+in+arabic'. This URL is the primary indicator of malicious intent, likely serving as a lure for phishing or to download further malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://cctraff.ru/strik?utm_term=pick+me+up+meaning+in+arabic In PDF document text
    • https://cdn.sqhk.co/pimidima/hTjdgcI/cyberfoot_football_manager_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/vudebalox/ahgyja1/fikatuvoxuni.pdfIn PDF document text
    • https://cdn.sqhk.co/zuvutose/H9jgIhj/raid_shadow_legends_characters_list.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://s3.amazonaws.com/kiwopusafize/ken_guest_cultural_anthropology.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/temporal_artery_biopsy_operative_report.pdfIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/the_arrl_handbook_for_radio_communications_2007.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/15956378966.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/whatsapp_for_blackberry_os_10.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/biology_book_for_senior_high_school.pdfIn PDF document text
    • https://s3.amazonaws.com/tokudapele/how_are_you_answer_quora.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/wojitikudub.pdfIn PDF document text
    • https://s3.amazonaws.com/falufusu/1983_honda_cx650e_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/gujutavevive/xofedogaviwiwamepuxox.pdfIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/sexigirejatil.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/73821864237.pdfIn PDF document text
    • https://s3.amazonaws.com/bejokazemur/work_energy_and_power_quiz_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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000f72c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF72C 24784 bytes
SHA-256: 71a2b41e931fe99d8001d142e3118b33bf0f95f61748f55d704960d32194f3f8
font_00_sfnt_off0000c1f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1F2 4940 bytes
SHA-256: 43b237f7ec1381bda7ff6f67bba82d4af4c803adb9a3fc8e13d869c7ff1f138f
font_01_sfnt_off0000d295.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD295 10604 bytes
SHA-256: 9454155bfab2dab00b32a2a0b9cb1c62907ffce975e063b1fe9f569a23f94d31
font_03_sfnt_off0001238f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1238F 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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