Malicious PDF — malware analysis report

Static analysis result for SHA-256 10c3f55ae00d6aa2…

MALICIOUS

PDF

69.4 KB Created: 2021-09-28 15:37:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9eca0a52a8089efe8650a3ac449399ac SHA-1: 2c12577a4646dde516f49f7a9d9ab6c31d7cc9de SHA-256: 10c3f55ae00d6aa2e61bf40801c4d46e7d3ca6efe768dc78160b39eb5e63cc03
114 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1566.003 Spearphishing Link

The file is identified as a malicious PDF by ClamAV, specifically as Pdf.Phishing.Trojan. It contains an embedded JavaScript stream and an external URI pointing to a URL that appears to be part of a phishing lure. The combination of these elements suggests the PDF is intended to trick users into visiting a malicious site, likely for credential theft.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.ebenisterie-burette.com/ckfinder/userfiles/files/66171636148.pdf
    • https://propertiproperty.com/Uploads/userfiles/files/gijaxesetosuxo.pdf
    • https://adikkeempat.com/contents/files/16857009964.pdf
    • https://delcinfo.ru/img/files/files/69525687356.pdf
    • https://22importexport.com/eimages/file/92649046305.pdf
    • http://tractortools.cz/ckfinder/userfiles/files/12614482851.pdf
    • http://picart-personal.pl/fckupload/upload/file/tuxod.pdf
    • https://loyd.rs/images/file/bazikumulusorupokewoxunuz.pdf
    • http://rasciindia.com/firetech/ckupload/files/pivaguxiribim.pdf
    • https://purevdavaa.mn/uploads/ckfinder/files/3017335036.pdf
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/161387d2a08f94---42828155711.pdf
    • http://www.lnk-creation.fr/upload/file/63345154373.pdf
    • https://speculatio.in/ci/userfiles/files/4091512544.pdf
    • http://ranjitabiswas.com/userfiles/files/21974789383.pdf
    • https://luckyfood.itweald.com/uploads/files/612edc3b48d5d.pdf
    • http://atoutslegion.com/userfiles/file/davuwas.pdf
    • http://autoscuolapezzano.it/userfiles/files/33120808475.pdf
    • http://goldenteriyaki.com/uploads/files/jaxogu.pdf
    • http://ammk.sk/userfiles/file/xidufekabuzu.pdf
    • https://trinityautorepairs.com/uploads/files/xididapot.pdf
    • http://synthecinter.com/userfiles/files/72433636333.pdf
    • https://vietnamairlinescorp.org/js/ckfinder/userfiles/files/90915460436.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=how+to+transfer+photos+from+iphone+to+android+phone
    • 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_off0000af6a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF6A 16792 bytes
font_01_sfnt_off0000c781.bin
f6018ce37b42ffc5126dffa09402815587082fc857148e9cd43a77affe67fcfd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC781 10792 bytes
font_02_sfnt_off0000e02a.bin
411c8dc46ede05b2159e19b1b65be282dd9480c3f1832e62eb087daba5e67aca		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE02A 15040 bytes

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