Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffaa8fe50416baeb…

MALICIOUS

PDF

564.9 KB Created: 2021-07-17 09:00:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 14740f7977b68ded57c4fd7d28bb5a43 SHA-1: 1c875774b5d1e7999cdd8fd1bd5c85f57b829d31 SHA-256: ffaa8fe50416baeb521e15acf01c04d4a2964743097ee1d549948bd9043bf9d5
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is identified as malicious by ClamAV with a Pdf.Phishing.Trojan detection. It contains embedded JavaScript, which is often used to exploit PDF vulnerabilities or redirect users to malicious sites. The presence of multiple links pointing to compromised WordPress upload storage and other unknown URLs suggests a phishing or credential harvesting attempt. The embedded JavaScript likely attempts to download and execute a second-stage payload.

Machine Learning

  • Nyx PDF Classifier clean score 0.1255

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfe42c64ca---14780339061.pdf In PDF document text
    • http://ahlhy.com/uploads/file/251356092708.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/5e626dd3d36900caab511eb3f0e0077f/bajirifakodam.pdfIn PDF document text
    • http://indago-rovigo.it/userfiles/files/bilorunadoloxafeledi.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608244e8829bb---35970811794.pdfIn PDF document text
    • http://b-solutions.net/userfiles/file/97438797828.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16086b248d6363---rugar.pdfIn PDF document text
    • http://jandebruijn.com/uploadimages/files/87738600493.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608d69eb4443c---52621809369.pdfIn PDF document text
    • http://alexanderjamesbackcatalogue.com/userfiles/file/93400427861.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc855b00a7e---25932138859.pdfIn PDF document text
    • http://beateromer.com/bilder/file/tobasudibowisajomawe.pdfIn PDF document text
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/56c7c2d027a2e03e9de72c3ca47ba8c0/97924788568.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc1e5830ecf---rojuwex.pdfIn PDF document text
    • http://conblocmanado.com/pics/file/xobos.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/68072953691.pdfIn PDF document text
    • https://vegas-shop.net/uploads/files/bajukejuneviwapubuzi.pdfIn PDF document text
    • https://hfdjet.com/wp-content/plugins/super-forms/uploads/php/files/8b53f9b33d1a68e1d7d3580e5751a428/suxoxusanobativuva.pdfIn PDF document text
    • http://dyglas.com/userData/board/file/64045037407.pdfIn PDF document text
    • http://daieimotors.com/js/upload/files/32731665362.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/cf1dbb4bb21a9330dc8196271b919140/bobukikuduwonazi.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16088d5acab099---vakitubarusula.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160748785582e3---3535034020.pdfIn PDF document text
    • http://liddellgaryfamily.com/clients/863293/File/turak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=directed+line+segments+and+modeling+assignmentPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00088136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88136 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0008994d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8994D 10716 bytes
SHA-256: 52b606e181e0cb2d18c79af6064c24de5cadfafddd126deb6f9a1afeaf86c140

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