Malicious PDF — malware analysis report

Static analysis result for SHA-256 018ba50e125ed680…

MALICIOUS

PDF

59.5 KB Created: 2021-08-25 09:13:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dace4be29a10ee803888cf2dfc98a8a8 SHA-1: c41cf719ce53eafb3998b8dfc2f3fb6e14c84a4c SHA-256: 018ba50e125ed680c144beb5c53ec3da6b8346aa7ead470a9baef61aee7d3cd4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, directing users to multiple external websites, some of which are hosted on compromised CMS platforms. The embedded URLs suggest an attempt to lure users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8834

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/41d2f1a0eea8b160787d6bb6b5b53225/1682051176.pdf
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb02374b95---wofipuwowux.pdf
    • https://epiphanych.com/images/file/40907941413.pdf
    • http://computergramm.com/userfiles/file/27040346265.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/22485148c353cee33cfe8385b580bd14/vibuvubebibawatodu.pdf
    • http://tznjl.com/userfiles/files/munuvix.pdf
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/55327a6c5d4b3ef8161e7e7fddacd9a0/selabefafumiregipezoman.pdf
    • http://dges.in/userfiles/file/51087040698.pdf
    • https://zebcom.in/userfiles/file/wojaramegefegunuk.pdf
    • http://bagumul.com/file_upload/spaw_upload/file/20210507100616.pdf
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/64c46127a61768f98bb9a435de9ffa1a/51525454615.pdf
    • http://rheinmotel.com/userfiles/file/tiridinebe.pdf
    • http://leadershipcareer.kr/fckeditor/_upload/file/safavuxoputafujo.pdf
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/28d0be5d9bae973a525dcb17a97145de/29912966123.pdf
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088735d0f4b1---weviladenemejukuweka.pdf
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16078e01e7cfd2---refube.pdf
    • http://blesk-stroy.ru/userfiles/files/37647196217.pdf
    • https://frontiermyanmar.com/sites/all/libraries/ckfinder/userfiles/files/43189610097.pdf
    • http://changju-hotel.com/CKEdit/upload/files/zenililodoni.pdf
    • http://dentherapia.hu/files/file/83548723508.pdf
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/16093b1a87d99a---12178499659.pdf
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/e4b10d4ecc1f54a405cfc3f626762937/57991001138.pdf
    • http://golden-candies.ru/webroot/files/files/47373773775.pdf
    • http://goldnumber.info/userfiles/file/bagakiximosipiwaxitek.pdf
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/007f9e468bfe405cff4c0b9d4fdd6bf7/xitibugokerugazapozew.pdf
    • http://www.aluvascientific.com/UserFiles/file/11695043192.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=bleach+heat+the+soul+7+iso+download
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da1c.bin
781bd75619167d17b9886a88e100686352dece6573e735221b02878c502db413		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA1C 10656 bytes

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