Malicious PDF — malware analysis report

Static analysis result for SHA-256 65f3d60d9122ace1…

MALICIOUS

PDF

41.5 KB Created: 2021-09-23 06:33:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b03f74c38390b17a191c26d728eae656 SHA-1: f7643e311c1cd6c2bf64e50fd78b7ccff4fcf578 SHA-256: 65f3d60d9122ace111d306ec609681123064a17212e668a42102bdf841590070
152 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a phishing lure, including being image-only with a clickable action to an external URL. The embedded JavaScript and the high ML classifier score further indicate malicious intent. The document likely attempts to trick the user into visiting a malicious site or downloading a payload, as suggested by the ClamAV detection and the numerous external URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7092

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 41 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://cructi.ru/uplcv?utm_term=nova+versao+android
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16135a7448dabe---fimozawerabovorujasorabo.pdf
    • https://triatlonshop.cz/userfiles/file/zizozose.pdf
    • https://stiff.pl/ckfinder/userfiles/files/tafabovuduxa.pdf
    • https://alyosserspneed.com/userfiles/files/93497295099.pdf
    • https://unaizahic.com/Files/files/33483174342.pdf
    • http://bigbazar.cz/is/images/FCKeditor/File/56813370827.pdf
    • http://perchegouet.com/ckfinder/userfiles/files/14112841102.pdf
    • http://guides2alpes.fr/uploads/file/ridujubimurosewosumuvefew.pdf
    • https://jagamimpi.org/contents/files/57895903368.pdf
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/161434b5bb76a1---87463713517.pdf
    • https://funcarele.com/ckfinder/userfiles/files/13246584548.pdf
    • https://yantrasearch.com/ckfinder/userfiles/files/40136673129.pdf
    • http://aleshashop.net/uploaded_files/userfiles/files/48663798600.pdf
    • http://chataphan.com/file_media/file_image/file/sunuj.pdf
    • http://lamorenj.com/userfiles/files/81231933970.pdf
    • http://garage-fuji.jp/js/upload/files/30593711158.pdf
    • https://mkontakt.pl/dat/file/90247068196.pdf
    • http://www.pratikchoudhury.com/fckimages/file/detasufabobibumuxujewoj.pdf
    • http://diennuocdanang.com/uploads/image/files/16805827637.pdf
    • https://hglobaltourb2c.com/FileData/ckfinder/files/20210916_BA40879C95D77C7E.pdf
    • https://designmaster.in/scgtest/eec-new/codelibrary/ckeditor/ckfinder/userfiles/files/pifogetaji.pdf
    • http://halaljones.com/uploads/files/xudunoparowadudetukujoli.pdf
    • http://huichem.com/ckfinder/userfiles/files/26555897053.pdf
    • http://warwick-ems.org/userfiles/file/62902385909.pdf
    • http://flairpens.ru/uploads/file/dubarikifudoxorazurowebot.pdf

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