Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1b2403cc3be56aa…

MALICIOUS

PDF

43.1 KB Created: 2021-06-19 08:36:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: e67ea8c94524ef71668256e46bb6e608 SHA-1: dd762fab617bb1d893ee5471337dcd70e402b64a SHA-256: c1b2403cc3be56aa02590ac32e3d3473739f6def5809f479c0a784e24696f76a
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its image-only nature and embedded links, typical of social engineering tactics. The document body, though partially corrupted, suggests a lure for a "free mini pig crochet pattern." The numerous links point to compromised CMS uploads and disposable hosting, indicating an attempt to redirect users to malicious sites. ClamAV detection and ML classification further support its malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8598

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 43 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://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/d1b5c654bc6e2ed1ed1c6e2ce8638429/xerozomomafuribabewa.pdf In PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a62c845d10b---luwapunaduzusejamavuwi.pdfIn PDF document text
    • http://bhhangkhong.com/upload/images/files/43655863864.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bcc099b7ca9---41073198738.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee4178157e---mosegaxab.pdfIn PDF document text
    • https://stijsr.com/userfiles/file/lofewo.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160941f2412982---makuboli.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/7dr1u72dj11pglmsjsttav41v3/19194714413.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/nipm72c3d70dbe75ut6h0khvti/63502506621.pdfIn PDF document text
    • http://sbhs1967.com/clients/8/89/8985ce50e7417da620f75e2af787291b/File/favitosexovaxepinudid.pdfIn PDF document text
    • https://ancoraeducacion.com/images/74386239957.pdfIn PDF document text
    • https://chetanaus.org/bheru/uploadfiles/file/29747454849.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad3141f62a---19035906593.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160a43f79da0ea---lalepewibere.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/99649409761.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/8ad12514c412624a2834c2240148af04/doneneposederajuva.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=free+mini+pig+crochet+patternPDF link annotation

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