Malicious PDF — malware analysis report

Static analysis result for SHA-256 568e4896b5900bc7…

MALICIOUS

PDF

39.7 KB Created: 2021-09-02 02:52:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 63c716ee2077879f1c7f25c62fbb646f SHA-1: 244f89393950a43c07a1dc1bbd20d42f767314ec SHA-256: 568e4896b5900bc792ac3f20a7629ab3c38fffa3425fa5394917358c2e403d9b
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The sample is identified as malicious by ClamAV and ML classifiers, exhibiting characteristics of a phishing lure. It uses an image-only interface to conceal clickable links, directing users to compromised WordPress upload directories. The PDF structure and numerous external links suggest an attempt to lead users to malicious content hosted on potentially disposable domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8821

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://shop-ecobati.com/medias/upload/files/97007659341.pdf In PDF document text
    • https://lescourailleurs.com/upload/editor/file/60584931555.pdfIn PDF document text
    • http://stillincontact.com/images/mails/file/voruvofo.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160ada043a4768---67507444808.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160aedfde2529e---livoxamojasezifenonux.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/0bf6a9472db301937a355ca2d76fdf89/34452787326.pdfIn PDF document text
    • http://dydlhx.com/upfiles/file///nuseputezifati.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3c74cbaeba---29733772498.pdfIn PDF document text
    • http://kondicionery-elektrostal.ru/upload_picture/file/dodafomufedevosugitap.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/c4d4fca65489caff414f03717175ba77/74322151147.pdfIn PDF document text
    • http://wonikqnc.com/upload/editor/file/1626536199.pdfIn PDF document text
    • https://ivantomanov.com/userfiles/file/90126132713.pdfIn PDF document text
    • https://residenciasanamaro.es/userfiles/files/46095500151.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609077e5c45c2---lajebiwu.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/ga5qv5gr7meih65c51d12hi70p/7517388056.pdfIn PDF document text
    • https://viettrungson.com/media//Files/63916032626.pdfIn PDF document text
    • http://cherryontop.pl/upload/fotki/file/66747417054.pdfIn PDF document text
    • https://www.chablis-gautherin.com/ckfinder/userfiles/files/67968012645.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=funny+lines+from+christmas+moviesPDF link annotation

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