Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ebe058c44605bf0…

MALICIOUS

PDF

63.6 KB Created: 2021-09-04 21:10:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 0ed42bfee657d5ed0b77743d25a9ff86 SHA-1: 33d88418be7c03c0d9d1df56a19af4118fdc7504 SHA-256: 6ebe058c44605bf0f3100c811cb3618c7ff238a3ffaf7c2641ff6cc848571d60
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to potentially compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the nature of the embedded links and the heuristic firings point towards a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8922

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 https://nomylo.ru/uplcv?utm_term=yuvashree+new+list+pdf PDF link annotation
    • http://adainst.com/uploade/files/20210621174844.pdfIn PDF document text
    • https://vinocastillo.hu/editor_up/80474689358.pdfIn PDF document text
    • https://pomacanthe-art.fr/imagebeforeafter/files/kegexonibit.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/5cc2b300f1e576eb56f2754bf024c0c8/55299462614.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/23c36d78c935a70ae1736d078863223e/72341799430.pdfIn PDF document text
    • http://tv-sat.cz/userfiles/file/12227514340.pdfIn PDF document text
    • https://manorhair.com/uploads//files/202108091956296477.pdfIn PDF document text
    • http://scpt.it/userfiles/files/laguvupazipipelukanij.pdfIn PDF document text
    • http://daimarconstrucciones.com/images/admin/file/wiwezilata.pdfIn PDF document text
    • http://unstitchedfootwear.net/files/file/87837167290.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a1e6b1ba88---96239510472.pdfIn PDF document text
    • http://barcelonasixtytwo.com/userfiles/file/sulabizog.pdfIn PDF document text
    • https://landbondcorten.com/attachment/file/15d1d1a540a04528d8759a18e913ddf1.pdfIn PDF document text
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/f80b0b89b92a12108dd72ab5c97314ef/jopovifimofagapi.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/16077225d14428---nelarag.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160fd9ea4cefb2---gupekosurumus.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eb53d8b7f5---58276222384.pdfIn PDF document text
    • https://igraonica.me/userfiles/file/ziwupisapogowufuku.pdfIn PDF document text
    • https://nada70.org/userfiles/file/wenopenanozomuvixigazivi.pdfIn PDF document text
    • https://dovolena-jiznicechy.cz/uploads/46132964451.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16070a361967c8---11528276405.pdfIn PDF document text
    • http://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/4a2033e6f087768fd064b71416d79530/9105545098.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c96e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC96E 17800 bytes
SHA-256: 12c0086789765865bb56e47906340e63b2ee2078c8b875bd7d348c1f5987455d

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