Malicious PDF — malware analysis report

Static analysis result for SHA-256 b507ffbe06a1c014…

MALICIOUS

PDF

44.3 KB Created: 2021-09-05 07:51:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ea27d840241008add1e2caa2bf4b2e74 SHA-1: 023084b618d2cdd076da3dda7c5efaea5573a100 SHA-256: b507ffbe06a1c014a7d64b61a1f9fefc181ad00d4219280cd5da4447af2425f2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS uploads, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier indicate a high likelihood of malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6884

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 http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b2a91df2d71---47490303982.pdf In PDF document text
    • http://ahchala.com/img/file/88456342387.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/43d97a8366cb5bb0fdaaa4bd65a39608/48278535205.pdfIn PDF document text
    • https://betenenergy.com/sites/default/files/file/gijemenuwomupif.pdfIn PDF document text
    • http://vyveva.eu/UserFiles/File/53831516145.pdfIn PDF document text
    • http://studiomarazzi.eu/userfiles/files/45362711245.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b311f2a742d---77044343007.pdfIn PDF document text
    • https://bataretak.com/img/files/file/mibanujanireriz.pdfIn PDF document text
    • http://aiken7050.com/clients/5/51/510ae66c864a6d23552e02d1b5190e2c/File/wezijunepab.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609f3049013a3---5798822980.pdfIn PDF document text
    • http://studiocalderini.it/userfiles/files/xidapobikomijadaragubo.pdfIn PDF document text
    • http://tfforming.ru/d/files/72131179312.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/41990613288.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609f4bf3e954e---4899942984.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d24f17b5e3c---81727472262.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160bf92cf9af16---31784891353.pdfIn PDF document text
    • http://michellesmithscott.com/clients/36670/File/56081343346.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/16113f34ef335c---kugodeduta.pdfIn PDF document text
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/kvu8e2hkb1fm43tj2538ev8s3p/10436555029.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca40d12346---mabizezadufusovi.pdfIn PDF document text
    • http://kirilmazbardak.com/userfiles/file/gusosomuwut.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/12b30d4219f25d0b461e65f773d09de9/94133904724.pdfIn PDF document text
    • http://schroniskoorzechowce.pl/ckfinder/userfiles/files/87616165262.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/6221082916.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/wubiparotasoti.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=district+court+recruitment+shortlist+2018+pdfPDF link annotation

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