Malicious PDF — malware analysis report

Static analysis result for SHA-256 87af026aaefbb946…

MALICIOUS

PDF

40.4 KB Created: 2021-09-25 00:37:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c2dfaeaecda8d362a11ace3c8815efa6 SHA-1: 652c95f753dd8739b68c030ffabf9d0101fb1b16 SHA-256: 87af026aaefbb94641d020baf3c127e13c7a21f90af899df2d7f9fb9fc007c5a
154 Risk Score

Malware Insights

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

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier further indicate malicious intent. The primary goal appears to be directing users to download potentially harmful files via these deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7470

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://crewmak.ru/uplcv?utm_term=download+imls+apk PDF link annotation
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f066973ebb---wuwagejutusokevul.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/mkg8r9kpnfmroj7rsvdhnuk1q4/25828939419.pdfIn PDF document text
    • http://faradtvandor.hu/picture/userfiles/file/nabatomozusaz.pdfIn PDF document text
    • https://cungcapthitdetuoi.com/app/webroot/files/images/pages/files/55701448825.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614aeea3093ce---jamiradetafazumes.pdfIn PDF document text
    • https://tsegypt.com/file/46806188767.pdfIn PDF document text
    • https://snf.styleguides.ch/userfiles/files/difojesopalavilifo.pdfIn PDF document text
    • http://multi-accueil.fr/ressource/site-image/files/parobijomanurinuxuwi.pdfIn PDF document text
    • http://psn-monolit.ru/img_file/files/16104180180.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/h1vdbpg4v63eu70o2inuc2f5dh/36790935416.pdfIn PDF document text
    • https://rawoctane.com/uploads/file/jarutoxafubaguxe.pdfIn PDF document text
    • https://henseltech.cz/userfiles/file/29543384080In PDF document text

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