Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1f714d7c2e25800…

MALICIOUS

PDF

44.3 KB Created: 2021-09-02 22:07:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: aca807b6961788065ed53165122201ac SHA-1: 8a1305c30a8ac6ad55b4dfca5d052c845cb4db07 SHA-256: e1f714d7c2e2580060534d7d9b508766ca427f071f305a8b1d52643811fe34d6
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to various websites, some of which are hosted on compromised CMS uploads. The primary purpose appears to be directing users to external sites, likely for malicious purposes such as credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8013

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://archism.ru/uplcv?utm_term=dividing+whole+numbers+decimals+worksheets PDF link annotation
    • http://guanzhuli.com/userfiles/file/36088347058.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160726b6543f5f---79125796948.pdfIn PDF document text
    • https://khyatiinfotech.biz/ckfinder/userfiles/files/97338898678.pdfIn PDF document text
    • http://gianniarnaudo.com/userfiles/files/2050724226.pdfIn PDF document text
    • http://findusafranchise.com/files/files/detukelijebakigazono.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/loxudixubanitobuvetu.pdfIn PDF document text
    • https://kme.pl/global/app/webroot/uploads/file/16240600098276.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/582fcfe4050c110e36a4da44767d4d77/51413042762.pdfIn PDF document text
    • http://mpti.ru/userfiles/file/68348436294.pdfIn PDF document text
    • http://esistore.be/userfiles/file/65131504670.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160d8fdde409d1---30062409069.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/2fba590d68d4c0e6e9d0b1c7c3f8669c/23348608914.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16072c1bb15e93---12748364836.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073bbf9e9edf---bipifebe.pdfIn PDF document text
    • https://muachungbaohiem.com/uploads/userfiles/file/romewav.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad9dab7b22b---gojivezebevojak.pdfIn PDF document text
    • http://naosgym.com/userfiles/files/31621252022.pdfIn PDF document text
    • https://tedvandergulik.nl/userimages/file/tijunuzaretegi.pdfIn PDF document text
    • https://itacademyindia.com/ckfinder/userfiles/files/95679352135.pdfIn PDF document text
    • https://dcoderesearch.com/uploads/tujidatozuvujuzume.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160c8db5fbaeb9---78860769124.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbfb7d7571---xizazunot.pdfIn PDF document text

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