Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9bf1e1143c7293e…

MALICIOUS

PDF

230.6 KB Created: 2021-09-07 10:11:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 7197f1c9157111a91a66bdfa7cdfca35 SHA-1: 13f78307de90f0f256cfe150d56e94b574c71b5c SHA-256: c9bf1e1143c7293e97ae30189a67990cdbf894afc11c8c02e21501146a9c6e6e
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is often used to initiate malicious actions. The heuristic firings indicate the presence of external URIs and a link farm pointing to compromised WordPress upload storage, suggesting an attempt to redirect the user to a malicious payload. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7375

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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
  • 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://albarossa.jp/js/upload/files/pipid.pdf In PDF document text
    • http://simonide.org/userfiles/file/tesowulameparikomilaname.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/nsq62uedsov9d2vshnh4dlv0aj/58683321369.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/41e1f63f644e19f3d5235c477dbcb8aa/sasijodemo.pdfIn PDF document text
    • https://altonika.pro/files/fck/file/loxin.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9199531f5d---45664282415.pdfIn PDF document text
    • http://sonkertrail.org/clients/9/92/9260a3c387aed4615f72c72c3a1da295/File/nuxosiwebe.pdfIn PDF document text
    • http://skiflogistics.ru/userfiles/file/24378744416.pdfIn PDF document text
    • https://remoteyourstaff.com/calisma2/files/uploads/65887619593.pdfIn PDF document text
    • https://termoformat.md/img/files/gifekudolubewidaje.pdfIn PDF document text
    • http://111-orte.de/testarea/cwsCMSlight/media/files/jopapenupej.pdfIn PDF document text
    • http://asfalon.com/__files/file/46718455196.pdfIn PDF document text
    • http://studiolauramoschini.it/userfiles/files/90592723182.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/c6b43adecf969e0e7227df68225a91f5/pufuridubozuxazemizama.pdfIn PDF document text
    • http://toyotarenta.net/FileData/ckfinder/files/20210723_E6708E8A59DA851E.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a765b43e29---ridufejaduwu.pdfIn PDF document text
    • http://asirakademi.com/resimler/files/46320474605.pdfIn PDF document text
    • http://loscogliodifavignana.it/userfiles/files/gegojit.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/e04361fd89adfbd801906f3b7a1f604b/33619912332.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/04954f53d95925f59a242affe584593c/40161932316.pdfIn PDF document text
    • https://sensesgrouphk.com/louis/STARKGROUP/ckfinder/userfiles/files/29523319696.pdfIn PDF document text
    • http://okna-kursk.ru/page_edit/_samples/userfiles/files/57460027045.pdfIn PDF document text
    • https://tsafar.ir/basefile/tsafarir/files/sixegim.pdfIn PDF document text
    • http://www.frank-diagn.hu/userfiles/files/8273321757.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/midpcfjpg49mbejaqghm7ff3rc/rebozazujivesegazixav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=%D8%B1%D9%85%D8%A7%D9%86+%D8%AE%DB%8C%D9%84%DB%8C+%D8%B9%D8%A7%D8%B4%D9%82%D8%A7%D9%86%D9%87+%D9%88+%D8%B5%D8%AD%D9%86%D9%87+%D8%AF%D8%A7%D8%B1+pdf+%D8%A7%DB%8C%D8%B1%D8%A7%D9%86%DB%8CPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000389b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x389B7 9372 bytes
SHA-256: ab692011bb810b4091e5b6863c1468cc19624005727076e0e42723678ec61724

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