Malicious PDF — malware analysis report

Static analysis result for SHA-256 61f297e2fb8349c5…

MALICIOUS

PDF

39.3 KB Created: 2021-05-09 23:35:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 89572d5512e0efc3ca252d452ddebd18 SHA-1: a4dbd3c197b25d3cc7267308f6404ac6e8748e8f SHA-256: 61f297e2fb8349c56d5dcc7dd5be3e9d7e5c7f598c48b6ef0b3723d16ec9e8d7
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits characteristics of a phishing lure, using an image-based design with a clickable link to external content. The presence of multiple links pointing to compromised WordPress sites and disposable hosting, along with a high ML classifier score and ClamAV detection, strongly indicates malicious intent. The embedded URLs likely lead to a phishing page or a second-stage malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7559

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 39 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://pistant.ru/uplcv?utm_term=casio+991+calculator+manual PDF link annotation
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/429457cd8eecaea9e1e7016e904e98fa/22232107936.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e0e86afd65---tovatuw.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/430458560b597b4c13bb61e115c6495b/34814365165.pdfIn PDF document text
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/e84a6444e2badf20719a9533fc2ca824/11097932768.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9ed8a379b---kojadinuvuf.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16075e13bcd07c---wikopowomoxuzamal.pdfIn PDF document text
    • http://aliglobshop.com/userfiles/file/97543546152.pdfIn PDF document text
    • http://angelojrobles.com/admin_initial_test/userfiles/file/fimukupikazilabidosib.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160751ec1e9a98---61552504722.pdfIn PDF document text
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/8dd942e3ec2168690737fc84d0d48068/nexonitetas.pdfIn PDF document text
    • http://cuatro-pr.org/sites/default/files/file/lodef.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607262c590db9---tomonivatelasoki.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608ba451e4fe8---gimeverururupef.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/2k6tha8g5nbnuqpsugnbu4nb69/mafokon.pdfIn PDF document text
    • http://aweibel.com/Photo/file/bixupajigefojujibeju.pdfIn PDF document text

Related samples 8

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