Malicious PDF — malware analysis report

Static analysis result for SHA-256 e27778eb71dfad40…

MALICIOUS

PDF

39.2 KB Created: 2021-06-29 15:04:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5edb842bf707eeb70cd50f054841dd4c SHA-1: 528f5ba45d5d81b60bfc149f525d855cf9360a87 SHA-256: e27778eb71dfad40b6a3fc8c60e0cc7322ac4d6ae42f5b5fb37e6844275f3328
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits characteristics of a phishing lure, utilizing an image-based design to obscure clickable links. The presence of numerous external URIs pointing to compromised CMS upload storage and disposable hosting suggests an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a malicious intent, likely to facilitate the download of further malware or to phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8588

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://philabc.ru/uplcv?utm_term=unconventional+machining+process+book PDF link annotation
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b8b5860cfa5---27004180246.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/31538063351.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/f2a393c60314b934150cad45a193fb6b/66284028241.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/8ec901844fce4cff5a4ef5e4d8972165/73173346248.pdfIn PDF document text
    • https://eventspicer.com/ckfinder/userfiles/files/81962956923.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/uiv8ohdqjplpa19f5ctjuivo46/34671374744.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/cfdqp1df11ckf0mo1nqv3n7sd3/mixepikenisamixigez.pdfIn PDF document text
    • https://zoomkish.com/basefile/zoomkishcom/files/nutafozimevunike.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607882d5d3615---15945058689.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160a7e665c11c9---56812812190.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/03ob91gnm0pipugi1ivvprdoi5/81542496609.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/39b00e7fc827777656cec68dac6eeee9/9802022276.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7102715b9---24328620258.pdfIn PDF document text
    • http://geologocarmignani.com/userfiles/files/susotugofoxuzuti.pdfIn PDF document text
    • https://escaletravel.com/userfiles/files/39337401685.pdfIn PDF document text

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