Malicious PDF — malware analysis report

Static analysis result for SHA-256 e21852333fb1fd92…

MALICIOUS

PDF

82.3 KB Created: 2021-02-27 12:57:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7454d3e6967e64e16f4a3f451bdab72 SHA-1: 5660da0b326f6819bc46531d9c689f752c4dcd1b SHA-256: e21852333fb1fd92e49f366b3d667da04a5156983428795b1aefebe37b40e4a4
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The file was detected as malicious by ClamAV and an ML classifier, indicating a high probability of malicious intent. A critical heuristic identified a 'Clipboard command execution lure,' suggesting the document instructs users to copy and paste content into a shell, likely to execute a second-stage payload. Several external URLs were extracted, some of which are associated with potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/wix?keyword=logitech+k811+review
    • http://blu-ital.space/baby_song_video_sinhalau4xyx.pdf
    • http://euroshopmn.space/wogejekawejezft9k.pdf
    • http://hookup157.site/la_peste_albert_camus_gratuit2d9mj.pdf
    • https://nidimojisojetuz.weebly.com/uploads/1/3/5/9/135962904/5144811.pdf
    • http://gedawuxofawu.iblogger.org/italian_carabinieri_uniform.pdf
    • https://cdn.sqhk.co/fapetemiji/eCgiqH0/9397829433.pdf
    • http://simcars.ru/48050324144qg2yh.pdf
    • https://cdn.sqhk.co/jisanipu/icihAgg/tegigunupawagodikol.pdf
    • http://kittyplay.online/shop_rental_agreement_format_in_tamillnbuy.pdf
    • https://ligizedafovawu.weebly.com/uploads/1/3/2/6/132680967/simuzuwurezanukamus.pdf
    • http://selolaz.66ghz.com/livunugur.pdf
    • http://torchland.xyz/fubogijovjkgjy.pdf
    • http://cloudplay.xyz/samsung_top_loading_washing_machine_repair_manualzxxdw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://pesuvomekujidi.rf.gd/bedingte_wahrscheinlichkeit_bayessche_formel.pdf
    • https://s3.amazonaws.com/meludav/internet_explorer_prompt_location.pdf
    • https://s3.amazonaws.com/tometubufimopim/ribawiku.pdf
    • http://metivatozu.epizy.com/ragilagofapidalexis.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f909.bin
16bd3527acea6672d102c95c4ca75a09fd6c9d0d4b49b366d59c23c52a38cba7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF909 4728 bytes
font_01_sfnt_off00010955.bin
5a60cdbef1b96d4963b47baf0a72229c4b3a0883e8759e31175b0a4441b2c92e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10955 10764 bytes
font_02_sfnt_off00012e36.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E36 4324 bytes

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