Malicious PDF — malware analysis report

Static analysis result for SHA-256 c97ac1568f23cf81…

MALICIOUS

PDF

84.1 KB Created: 2021-05-12 07:18:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 660d6466308dec36d259228bb14628a0 SHA-1: b7501139c7694b9a2922eb96342a9cebbfe6400b SHA-256: c97ac1568f23cf8193f43433d2ae7b76d71317cc5f121100897ab88226226879
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a suspicious domain, which is a strong indicator of phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to sailing rules, which is a common tactic to deceive users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://kuzutuzo.ru/strik?utm_term=racing+rules+of+sailing+at+the+start
    • http://kuwofadenokul.iblogger.org/ansi_c84_1_download.pdf
    • http://kefets.xyz/website_to_machxtas.pdf
    • http://kexedeziferu.sportsontheweb.net/approaches_and_methods_of_language_teaching.pdf
    • http://mesanezedid.mypressonline.com/14780651365.pdf
    • http://copytoshka.ru/newspaper_layout_designstu8m.pdf
    • http://rexevivejegox.scienceontheweb.net/26603340000.pdf
    • http://kozaredibedemok.iblogger.org/39779959378.pdf
    • http://urott-hu.com/beyblade_burst_rivals_videoswawvh.pdf
    • http://poxumanavofeboz.scienceontheweb.net/96916139920.pdf
    • http://gadetebes.sportsontheweb.net/abc_analysis_example_problems.pdf
    • http://pedagodogiko.getenjoyment.net/how_to_use_netgear_prosafe_switch.pdf
    • http://creditreportfast.info/blue_bossa_sheet_music_alto_sax4s4ro.pdf
    • http://ruvogodozipabiv.scienceontheweb.net/53388113072.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://8ab8d0a6-ebcf-4503-ac90-3c5d9a0926ce.filesusr.com/ugd/8585d4_e24d0bb1f45a447e872c8cb25ba1ed1e.pdf?index=true
    • http://dofumuligo.rf.gd/davotufuvizomeso.pdf
    • https://05f6fcc2-a4c7-4d5b-b58c-97b640a93f4d.filesusr.com/ugd/74147a_c64f05810ecc4ef3b409998d12829a5e.pdf?index=true
    • https://7ffe38df-ef78-47a1-8632-a9c579db478a.filesusr.com/ugd/8ff694_734b949549f445d2974fc4168a17bb1d.pdf?index=true
    • http://pilejifizodan.onlinewebshop.net/asante_mungu.pdf
    • https://c504e2ef-f928-4e80-b5b1-fc05046f432e.filesusr.com/ugd/247f25_04ad9889b94f4e0195a35cb2e2226e6e.pdf?index=true
    • http://renowuvix.epizy.com/80805673340.pdf
    • http://miganuvag.myartsonline.com/agriculture_bitbank_in_telugu.pdf
    • http://danitezuzaja.epizy.com/a_knight_s_tale_script.pdf
    • https://67acb2b6-3e42-4063-a073-371cb527a15d.filesusr.com/ugd/a81d48_ab98f733d05b4027b972aaed7c7f4269.pdf?index=true
    • http://dubanexotokegel.myartsonline.com/uniform_building_by_law_malaysia_2020.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f55c.bin
1ec596682ff8d69877185666f81164db690993633825138fbb01bb17bef49100		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF55C 5152 bytes
font_01_sfnt_off000106e2.bin
4636a89961f62ff3203fd73e6112d79b843028efaaa87133a4220dd659f45ed5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106E2 11096 bytes
font_02_sfnt_off00012d25.bin
532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D25 16204 bytes

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