Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ca8cca6e1ece7dc…

MALICIOUS

PDF

82.9 KB Created: 2022-05-27 11:00:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2022-07-15
MD5: f43801d99a0633622be3b926681703b0 SHA-1: f9fb68bc6f478732b2601c34ad085ae7a202c0a0 SHA-256: 9ca8cca6e1ece7dcf6a753bcfeac4d10938fc901313fed3031cff694b8a0be73
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged by ML classifiers and ClamAV as malicious, with a high risk score. It contains an embedded URI pointing to 'tevav.co.za', which is likely a phishing or malware distribution site. The document body is heavily obfuscated and appears to be generated by wkhtmltopdf, suggesting it's not intended for direct user reading but rather as a container for malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://tevav.co.za/YmrXLWy8?keyword=blues%20ideology%20and%20afro-%20american%20literature%20pdf%20free%20edition%20pdf
    • https://livupojinobiz.weebly.com/uploads/1/3/1/8/131856358/kesolokogupig-noxixezumi-gapevuxuji.pdf
    • http://bigcool.net/webroot/img/files/niwis.pdf
    • https://roxracing.eu/userfiles/file/vovijavibojolarefaga.pdf
    • https://maxizijemasapeg.weebly.com/uploads/1/4/1/3/141394373/limisofuna-moradokalud-fivixake-tukedoxafe.pdf
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1621f5a92f2913---94192067756.pdf
    • https://kisetujetu.weebly.com/uploads/1/3/2/8/132814277/patovaxud.pdf
    • http://mastersnab.pro/upload/files/78889872925.pdf
    • https://saganoxazusidax.weebly.com/uploads/1/4/1/5/141596078/157ad11d22266f.pdf
    • https://molekoror.weebly.com/uploads/1/3/4/3/134332017/vukolu_kezen_xiperu_mukuwo.pdf
    • https://runeburagaxe.weebly.com/uploads/1/3/4/6/134699488/662f6778f.pdf
    • https://bloomeng.com/uploads/kijuxis.pdf
    • https://razixolinatu.weebly.com/uploads/1/3/4/3/134384461/9699606.pdf
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/cr03j3mc9i3glqsmbqh7r0kid4hkhiql/wutivugevomegosoxubosuxi.pdf
    • https://onlineadda.net/ckfinder/userfiles/files/67302467289.pdf
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1622a110b5470c---89769674857.pdf
    • http://hun777.hu/_user/file/deserid.pdf
    • http://rund.cz/UserFiles/File/43596292331.pdf
    • http://dienhoabacninh.vn/webroot/img/files/kagizodubenugipisujulapi.pdf
    • http://ufnk.fr/app/webroot/files/file/43563084932.pdf
    • http://open.ua/uploads/ckeditor/files/pejeboligexazexinezin.pdf
    • https://kefenatab.weebly.com/uploads/1/3/4/8/134854159/rexivug.pdf
    • http://gsest.com.sa/ckeditor/kcfinder/upload/files/zagelaj.pdf
    • http://sangtaoad.com/uploads/userfiles/file/81433289734.pdf
    • http://kstarsmall.net/userfiles/file///66846940040.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://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_off0000de6a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE6A 16792 bytes
font_01_sfnt_off0000f681.bin
832b66f39f93285d896b793e605b1bd8f672db5b2f911223941e1966efceb718		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF681 11264 bytes
font_02_sfnt_off000110d5.bin
5183ec78ff08b1db0171e2c0e0003979e93232c0fa64d79e552992c5a3689cc1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x110D5 16876 bytes

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