Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b220ed137f5ee8d…

MALICIOUS

PDF

69.9 KB Created: 2021-09-16 19:18:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ca6b1e4d2e1926897f5b59697cd596e6 SHA-1: c314cd439a9ecd13adf13b10cac15dec573734bb SHA-256: 9b220ed137f5ee8d420bc730b5116a7db953656e05976c3e28b16df86cc743e6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting it functions as a link farm or phishing lure. The presence of PDF-specific heuristics like 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' reinforces the conclusion that the document is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6630

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.
  • 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 https://catamma.ru/uplcv?utm_term=other+browsers+for+android PDF link annotation
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/161404b08808b2---merefomidu.pdfIn PDF document text
    • http://onyx-innovations.com/assets/ckfinder/userfiles/files/19767210658.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/16131cf63d2124---nezodabazibojejup.pdfIn PDF document text
    • http://akekaluck.com/ckfinder/userfiles/files/5078909471.pdfIn PDF document text
    • https://bushregenerators.com/userfiles/files/99296443623.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/4538e840c74175e3d1090ab184faecc7/20763020870.pdfIn PDF document text
    • http://salt17.com/userfiles/files/xupelowegopevarisefenuwen.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130e92799113---90469096733.pdfIn PDF document text
    • https://conrays.ru/f/data/86335103005.pdfIn PDF document text
    • https://sakesushimn.com/userfiles/files/51543299378.pdfIn PDF document text
    • http://tienhasteel.com/app/webroot/upload/files/46846927399.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d941caea32---25584121020.pdfIn PDF document text
    • http://werkschoenenverkoop.nl/images/docman/files/4649234900.pdfIn PDF document text
    • http://techscreening.com/userfiles/files/35023094686.pdfIn PDF document text
    • https://produktybhp.pl/pliki_user/File/duruwipurovinuseb.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1613d98c51e2f1---tidigejoruselu.pdfIn PDF document text
    • https://tw-itemaos.com/ckfinder/userfiles/files/dekifetuxuje.pdfIn PDF document text
    • http://ifa-astrologie.de/userfiles/file/92617530258.pdfIn PDF document text
    • https://gsacademy.ge/uploads/files/silusefutubuvapomanu.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161410f2b90662---xigumewexotidinagor.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131c68aa747a---26662917151.pdfIn PDF document text
    • https://myparrotfood.com/user_files/files/47112604898.pdfIn PDF document text
    • http://gndpta.eu/news_objects/files/59043647560.pdfIn PDF document text
    • http://myapartment.de/web/editor/files/wesofofemelinawu.pdfIn PDF document text
    • http://sobinco.cz/ckfinder/userfiles/files/jubitisixul.pdfIn PDF document text
    • 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_off0000e9fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FB 17248 bytes
SHA-256: b02c996e5de761c64257879ad7ebc45ce3ec87123f9fc67d65993c73e76ff2a2

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