Malicious PDF — malware analysis report

Static analysis result for SHA-256 9286d78160b416c6…

MALICIOUS

PDF

80.0 KB Created: 2021-03-12 15:16:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a3e2e5570c48e0ee7f8f028b72895fd SHA-1: 86703ef23579acc64a81f48832a6bca0e2df224b SHA-256: 9286d78160b416c666d4a1df7e02c0e7b04899fe8157a8d8374ce3e188518842
136 Risk Score

Malware Insights

MITRE ATT&CK
T1059 Command and Scripting Interpreter T1566.001 Spearphishing Attachment

The PDF document contains heuristics indicating it is malicious and attempts to trick the user into executing commands. Specifically, the 'SE_CLIPBOARD_COMMAND_LURE' heuristic suggests the document instructs the user to copy and paste content into a shell. The presence of external URLs, including one that appears to be a lure related to 'burp suite tutorial', further supports a phishing or social engineering attack vector. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://kuzutuzo.ru/123?utm_term=burp+suite+tutorial
    • https://cdn-cms.f-static.net/uploads/4481406/normal_6046b4da09130.pdf
    • http://xutexukoxobofi.mywebcommunity.org/25377098003.pdf
    • http://nurokojo.mypressonline.com/are_jelly_beans_ok_for_dogs.pdf
    • https://cdn-cms.f-static.net/uploads/4366384/normal_602056d6a191a.pdf
    • https://static.s123-cdn-static.com/uploads/4387582/normal_6002521466866.pdf
    • https://cdn.sqhk.co/totafeta/f7hg8wU/xenerewodetusa.pdf
    • https://cdn-cms.f-static.net/uploads/4369304/normal_60178e3da8f24.pdf
    • http://nupesupo.mypressonline.com/ways_to_feel_better_after_overeating.pdf
    • https://cdn-cms.f-static.net/uploads/4408702/normal_5fd30fa42ad10.pdf
    • http://punavuvipufov.sportsontheweb.net/quadratic_inequalities_gcse_worksheet.pdf
    • https://cdn.sqhk.co/tijinujul/djcqhaU/44327730180.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/figugipopar/gexadis.pdf
    • https://s3.amazonaws.com/xupovobejanam/examples_of_ethos_pathos_and_logos_worksheet.pdf
    • https://s3.amazonaws.com/zerepuzuze/23708830569.pdf
    • https://s3.amazonaws.com/faduxodiwo/which_of_the_following_is_true_about_multinational_corporations_mncs.pdf
    • https://s3.amazonaws.com/zetituri/82566378952.pdf
    • https://s3.amazonaws.com/bajuse/corporate_upbeat_music.pdf
    • https://s3.amazonaws.com/tidigudetefumof/asos_uk_size_guide_jeans.pdf
    • https://s3.amazonaws.com/vifusupegiza/92812305000.pdf
    • https://s3.amazonaws.com/gotenukevepunin/94950513751.pdf
    • https://s3.amazonaws.com/mefadedosuw/wewerulakavufufu.pdf
    • https://s3.amazonaws.com/jinabom/despacito_remix_justin_bieber_ringtone.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcf8.bin
e8fb72b2a9ba16a8eec16cd575de6206d004c76cd87e598927ae33d15fc0909f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF8 4860 bytes
font_01_sfnt_off00010d8b.bin
03d6a67f3fe3e27c546f2360cff5c5816abad0bd3c446a2cf2859764c6299b6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D8B 10872 bytes

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