Malicious PDF — malware analysis report

Static analysis result for SHA-256 b67d873b889bf61d…

MALICIOUS

PDF

54.5 KB Created: 2021-05-24 22:50:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8587f2d9d655287c894526a89c07cc57 SHA-1: 15b6587222ea0c2f4381522b631dfed9b1639263 SHA-256: b67d873b889bf61d4a7be0d27d370dfb1d3ea6d43ae725cf688f27ef9a88d3cf
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains numerous links pointing to compromised websites and disposable hosting, characteristic of a link farm used for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to malicious sites, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6509

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://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/2a3a8b7703e72fb3d9223ae0fec54287/40855305289.pdf
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a624b587180---77178463119.pdf
    • http://ajivikafinance.com/userfiles/file/22999531077.pdf
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/99e73ef1f56a64bb86a549b65e6c00dc/67772479358.pdf
    • http://ufnk.fr/app/webroot/files/file/86604790713.pdf
    • https://armagedonspedycja.pl/files/file/bironixatazevim.pdf
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609eedba2a18d---87221305624.pdf
    • https://cortopolis.ar/userfiles/file/zomeruzaxugukizomisetu.pdf
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16091774938bf1---zizukuxikibaxiboxanixara.pdf
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160ab6795ce3ec---tanokogagatetanotuj.pdf
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/3a49d0c9cb221a7a3f95b95617dcae37/joxexakozowaperozukumeloz.pdf
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083d768a55b8---34833820708.pdf
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/16089e2c70194a---47859116194.pdf
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082849ebabca---60228363819.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+change+alliance+in+star+trek+fleet+command