Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd2584b8f7ba9fcd…

MALICIOUS

PDF

63.6 KB Created: 2021-10-16 09:46:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: f8728ab3babbb94cdef95ba245ab92ee SHA-1: 7877b9e0586f5cd91ae08b9ffd01a24c08514519 SHA-256: dd2584b8f7ba9fcd418173dc8300e755068b8c5f355753482c7b2f4935a06a29
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress upload directories or disposable hosting, indicating a link farm designed to redirect users. The embedded JavaScript likely facilitates the redirection or further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6381

Heuristics 6

  • 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.
  • 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 https://crewmak.ru/uplcv?utm_term=rmo+previous+year+papers PDF link annotation
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1616629110cc1a---37669387339.pdfIn PDF document text
    • http://engcaphone.com/_UploadFile/Images/file/49582320227.pdfIn PDF document text
    • https://pasationtravellers.com/root/FCKeditor/file/wenonukusuz.pdfIn PDF document text
    • http://pop-around.com/file_media/file_image/file/45334540113.pdfIn PDF document text
    • https://atrax.hr/files/nesusega.pdfIn PDF document text
    • http://halongwave.com/userfiles/file/goremete.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161695338ae2ed---sisifabudamexemukopa.pdfIn PDF document text
    • http://ydis.kr/userfiles/file/09115826626.pdfIn PDF document text
    • http://ahknchem.com/upload/files/delogofagoguba.pdfIn PDF document text
    • http://metamorfozyayincilik.com/userfiles/file/jelanolemaxiwi.pdfIn PDF document text
    • http://hotelborgodeipoeti.com/userfiles/files/vubewesutemobalad.pdfIn PDF document text
    • https://oz.korytnica.eu/data/files/87704511838.pdfIn PDF document text
    • http://hainescentreasia.com/images/file/vizefokijinufises.pdfIn PDF document text
    • http://ominocoibaffi.it/userfiles/files/56773671950.pdfIn PDF document text
    • http://aotwresort.net/ckfinder/userfiles/files/xewixod.pdfIn PDF document text
    • http://invismortgagebroker.com/images/file/74955029462.pdfIn PDF document text
    • https://harshahometutors.com/uniformkontakt/userfiles/image/files/karomotikesamosulaz.pdfIn PDF document text
    • http://cobansut.com/userfiles/file/pakidebokonixa.pdfIn PDF document text
    • http://archbot.pl/files/file/xulunizokolakarezuronedon.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16164b33a502e4---zobofewokumulinisa.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/29f132c2091a7af29f02848467f7201a/livepanodebilabilanupidog.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/73457180021.pdfIn PDF document text
    • https://corumosmanlimakina.com/js/ckfinder/userfiles/files/muliwixolifaxakedik.pdfIn PDF document text
    • http://zamel2.pl/userfiles/file/soguxadovijadepiwim.pdfIn PDF document text

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