Malicious PDF — malware analysis report

Static analysis result for SHA-256 e53f0c6fecf4dd06…

MALICIOUS

PDF

84.2 KB Created: 2021-07-03 04:32:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0641e9fd6b96828f3a3b36209540d18f SHA-1: 33ae816b74aa22da18515fd7d281fd5360686f41 SHA-256: e53f0c6fecf4dd0609af8c53402ba02da2427075ee07ea027f50d5d5d5c1460a
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains embedded URLs that lead to PDF files hosted on various domains, suggesting a phishing or credential harvesting campaign. The PDF's structure and embedded content point towards a social engineering tactic to trick users into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://aneri12.eu/res/file/bivewobixuzixuwefepuj.pdf
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160abccb00d81b---7645220790.pdf
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/1uopkoe1l8dkjnlpfjn1ko28i0/56896378205.pdf
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/2b492f79edfa054f30a1b4a6ffcf712d/revatid.pdf
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8881e1422---polowerifamobiwuxozivona.pdf
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d434cf66f4f---bezorowed.pdf
    • http://sibmetiz.ru/upload_picture/49182258327.pdf
    • http://momsystem.ru/public/file/8158026831.pdf
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160746cc284403---88824655746.pdf
    • http://tinhdaurosa.com/Images_upload/files/20576948554.pdf
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adaed655ece---xejixaxutox.pdf
    • https://bcbc3399.com/upload/files/42337433325.pdf
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/bdab6cc766c810b5c7caf2f588c7be89/ririsotatavexamat.pdf
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/c71f85a7bd9aa47d96aebdc40f7e9bc6/99962187302.pdf
    • https://transmar.biz/ckfinder/userfiles/files/27258118824.pdf
    • https://canionglobal.com/FCKeditor/file/bijakuwopaledu.pdf
    • https://bursac.net/userfiles/file/52616576051.pdf
    • http://ucity69.com/clients/861769/File/vudugesebus.pdf
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c24b87eaf72---xiletasisokutobedes.pdf
    • http://atenngo.com/admin/sites/site/documents/20602032730.pdf
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/8951761554bfa7c86bfeda92186e2b46/38032217959.pdf
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609d1b3ecd361---31691026181.pdf
    • https://dietacud.eu/upload/file/ritudojoronetedezipobogu.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=how+to+find+the+slope+and+y+intercept+of+an+equation
    • 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_off0000e312.bin
ca8471ac787736728e35cf20037ce9413a3ca58d460f60214ada8eefe85a6491		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE312 17388 bytes
font_01_sfnt_off000110f7.bin
ed358279b7e4a6946aa9d4f78de2ebe0f9fc9352ec3a05c7aad5efd91efabe2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x110F7 11152 bytes
font_02_sfnt_off00012acb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12ACB 16792 bytes

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