Malicious PDF — malware analysis report

Static analysis result for SHA-256 93698fa934811db2…

MALICIOUS

PDF

145.5 KB Created: 2021-05-26 13:46:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43310c9c1c76945024a30a2ce43c9204 SHA-1: 48e7d979feede79613cb7c99f82d13b920514041 SHA-256: 93698fa934811db23316626ceb5e9df93978fe26f80c5e27b593532df07116bc
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The ML classifier and ClamAV detection strongly indicate malicious intent. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document is part of a multi-stage attack, likely to bypass security filters by instructing the user to decrypt an archive. The embedded URL, while flagged as benign, is part of the lure, and other unknown URLs are potential download locations for secondary payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607c4a30308b6---10235250523.pdf
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb3bd844ca---nupojiv.pdf
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/87abfb6458c9e5723e0345dc9b8f4d7f/dejijineminuxujifuzagotu.pdf
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608de5f9817a4---meremoxatugarif.pdf
    • https://consultingexpert.eu/fckeditor/userfiles/file/baxikajetovoku.pdf
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/6d373b56cf6597dcb9b60076ea1829c7/befafimopixuvaxeranetil.pdf
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16092adc044d30---97547786298.pdf
    • http://altelaw.com/uploads/image/file/xebori.pdf
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/1f3c750ee78fe269c3e2d2bf39ee0599/xuvubidobilobilurawem.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/nk0thegde4vd8dlgmloji304p5/bikevokofiniwupo.pdf
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607255e9e6980---83199638439.pdf
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab6756c891---lusokilovozesewo.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607add1a37295---91301259096.pdf
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a3607ca51d0---65319782721.pdf
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160854bcb3947b---63510867800.pdf
    • http://creativeindustries.ru/uploads/userfiles/file/wemipizavaxa.pdf
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/8c14adef3697ff187eb93edd33b8f2ca/perugavenigobozob.pdf
    • http://morgancountyoh.com/userimages/rozelozupovixefefut.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=free+amapiano+sample+packs+2020
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001d580.bin
c138f57a0eb105cbbc6135f72ed3211568d78ec2419be8b964be96156cb9d6c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D580 5372 bytes
font_01_sfnt_off0001e7a9.bin
6ae28a37b21e89befb5e014d655b2a6918ca2fb2b2281d7f0c68bbc2ea95fb62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1E7A9 5976 bytes
font_02_sfnt_off0001fd53.bin
4497b2a66cf2d75ab83fecb2c33cb72f38ca7eaad8d19ca6982c375319e3a7c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1FD53 10788 bytes
font_03_sfnt_off0002225d.bin
0294eb5a2b6ceb72decec23c86cf890fc4939c4c21a9d67d0afb5a41aa762641		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2225D 16272 bytes

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