Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5c2a70c73e0e6de…

MALICIOUS

PDF

93.7 KB Created: 2021-06-12 07:44:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1099c03392be2c79b3b37ba961df19ba SHA-1: e3273271df16f1fef8cf2bbdbe10a878f8c3e26d SHA-256: c5c2a70c73e0e6de660bfd92948752b5c77b8168a990dc70b1eae2b40afff4c2
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by ClamAV and a machine learning classifier. It employs a common phishing lure by presenting as an image-only document with a clickable action, designed to redirect users to external URLs. The numerous embedded URLs point to compromised CMS uploads and disposable hosting, indicating a link farm used for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7130

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 93 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://ketchas.ru/uplcv?utm_term=1980+tamil+songs+download+starmusiq
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a3b62993883---19113208784.pdf
    • http://zonweringbelgie.nl/ckfinder/userfiles/files/mobubilarolafurebivixemu.pdf
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/5t96qsoghhvetki2inijth4ge6/29352866570.pdf
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/9bagtg8uq3cf17393iird18oc6/bokinoneredegagu.pdf
    • http://www.abcklima.hu//data/editorfile/kukamakivefizejukijinip.pdf
    • http://www.asslar.de/downloads/xidujixifipepivowu.pdf
    • http://topas.lt/userfiles/file/86218087104.pdf
    • http://christschoolblr.in/userfiles/file/98437705608.pdf
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a71e4c4b75c---51648172803.pdf
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/15425559358.pdf
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/83c3cc438b3c07652a05493df37a8727/36827481452.pdf
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/c4f3cab6e03b07292a5c00d80ec8c879/87068031978.pdf
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/t6ov9acjac5vsv99vkaem3lvq6/pezimoxatunebaxufiku.pdf
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608dcedd42539---runezudowevabebilaf.pdf
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae288bb947b---lorebefakadesesupawibivef.pdf

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