Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fdf14a0540cb537…

MALICIOUS

PDF

76.9 KB Created: 2021-07-02 17:30:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e43d25e837d0bd58a9a327ccc783f63e SHA-1: 285912f2b52a188c41dd2f6175b5173f0ccabd4e SHA-256: 8fdf14a0540cb537e4ede4d4d6683f6f5d690b2cb5cd25dafd1e5d6ad63a6582
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains embedded URLs pointing to potentially malicious PDF files, suggesting a phishing or malware distribution campaign. The presence of PDF_URI and EMBEDDED_URL heuristics further supports this, indicating the document is designed to redirect users to external, potentially harmful, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://oklogistic.lv/upload/file/rotigokefugekovuxulogi.pdf
    • https://bibliotheque-des-arts.com/ckfinder/userfiles/files/rotizilakaxitineborab.pdf
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a03ae10bb3a---begonowilez.pdf
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/4100a99150ef316bffac47b824318b75/zavegoxe.pdf
    • http://moon-villa123.com/CKEdit/upload/files/jijilipet.pdf
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/1026b2137d72119c2571203ee454da14/62789469459.pdf
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/bce1e7c0fcc12dab7265f45b9856557b/lapofijizokes.pdf
    • http://folientastaturen.pl/_data/file/gedalawagaju.pdf
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/49983104126.pdf
    • http://ateliergermain.net/sites/default/files/file/90195422618.pdf
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/c223bb7e8ef2a96590eb17eb3b91383e/kibaboruwa.pdf
    • http://thetsaban3watnuea.com/UserFiles/file/xewenofilusaj.pdf
    • https://vibangnhadat.com/uploads/files/pimixojupona.pdf
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab69b6c26dc---89111299794.pdf
    • https://monuments-msk.ru/wp-content/plugins/super-forms/uploads/php/files/128c837b2121aa8f66bb6f20e04b2598/52787751122.pdf
    • http://flirdining.com/uploads/files/puvixurulesuj.pdf
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2f728868c---17895506867.pdf
    • https://condominiovillage.com/userfiles/file/dadasumi.pdf
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082ad7b0daef---naruwerilavupuge.pdf
    • http://www.kickcommerce.com/userfiles/file/88300346746.pdf
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/b50acb14b471a4501c686158b171abf0/30882281578.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=word+to+latex+converter+open+source
    • 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://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_off0000cb71.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCB71 16792 bytes
font_01_sfnt_off0000e383.bin
8cc7ed4eff5eb6c30a29ac896493a31dc2b67398116384f5718ef84719a4f48f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE383 16272 bytes
font_02_sfnt_off00010dfd.bin
79e19480acaedd9092dee07c581b49c77e8e342eba7c9a8c7c23bee8b748e41a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DFD 10676 bytes

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