Malicious PDF — malware analysis report

Static analysis result for SHA-256 21ef108d59122f9c…

MALICIOUS

PDF

84.9 KB Created: 2021-02-24 04:24:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 56c03c7e6cbd513abb14879468f69f03 SHA-1: dc112cd1d1ae2ff82a99215d0fc7ae53ba65f095 SHA-256: 21ef108d59122f9c9a7f823b82ea9750adf236ec36c6dda9edd38ba1ec1c6817
96 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with the primary one being https://bologen.ru/wix?keyword=cancer+the+emperor+of+all+maladies+book+pdf, which is presented as a search result. ClamAV and ML classifiers have identified this file as malicious, specifically as a phishing trojan. The embedded URLs suggest an attempt to redirect users to download further malicious content, likely disguised as legitimate files.

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
  • 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://bologen.ru/wix?keyword=cancer+the+emperor+of+all+maladies+book+pdf PDF link annotation
    • http://stopnutristrike.ru/70590041702pi9x0.pdfIn PDF document text
    • https://cdn.sqhk.co/dafibuxoki/WRhjSii/mx_player_pro_firestick.pdfIn PDF document text
    • http://madewithsunshine.com/the_five_dysfunctions_of_a_team_patrick_lencionib3reb.pdfIn PDF document text
    • http://mamajan.space/fadafowanunorakikuxe0b6.pdfIn PDF document text
    • http://fotonagosuslugi-01.space/nopokidavarivilakbydb.pdfIn PDF document text
    • https://cdn.sqhk.co/disumuneriva/cUgg8Iv/word_trip_level_498.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382617/normal_6001ccf4619dd.pdfIn PDF document text
    • https://cdn.sqhk.co/vaxofalu/njcihK3/sexigepivofaguvu.pdfIn PDF document text
    • http://reggis.info/multiplying_complex_numbers_in_cartesian_formpqi6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494877/normal_5fd1c4cbb5e7e.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/fenatagazise/kisugerenuzopigosemikafa.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/dimikelemarokonagi.pdfIn PDF document text
    • https://s3.amazonaws.com/fipijife/rolawijudumupi.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/21342728895.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_off0000d777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD777 4872 bytes
SHA-256: 3451da668e75c77698656157b00663aa9d0ac14dfd5372e89ede3b9db55adb26
font_01_sfnt_off0000e80e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE80E 5504 bytes
SHA-256: 01a90e386c1e66e1ac1e98224005356216d702485ca6981edc34dc9f619d8cdd
font_02_sfnt_off0000fa8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA8E 15652 bytes
SHA-256: 17ff04c4a3af0a060020699c050e004aa628d67a77918b1ea6fe049cb6f847da
font_03_sfnt_off00012aca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ACA 17852 bytes
SHA-256: 7862bef05d162d18c5440f5566615a03fc66b0789d739717cd8a7781fc628842

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