Malicious PDF — malware analysis report

Static analysis result for SHA-256 07b5f705d98707cf…

MALICIOUS

PDF

100.0 KB Created: 2021-07-02 09:44:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 3fe52cc3b932e3a42c74aadd6219346d SHA-1: d8e0e2d314e3f8db59a44b2f971cf5b1be8e1475 SHA-256: 07b5f705d98707cfa0ed71967d6148529a5cb395aa5fbb2d68b48ab93b1e71c7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple compromised CMS upload directories. The embedded URLs, such as http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160bc95763bc10---61094021138.pdf, are hosted on these compromised sites, suggesting a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/rlb785vusmsa7kesll6top3p07/meborusidemofin.pdf In PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/fofubojago.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160bdd03289949---jegibuwexomovenozikago.pdfIn PDF document text
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/303htqnnut7rj6rrs32ftmet8l/33385101551.pdfIn PDF document text
    • https://bya-ingenieria.com/ckfinder/userfiles/files/47498720948.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160bc95763bc10---61094021138.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/58912400749.pdfIn PDF document text
    • http://pixel-pro.ru/upload/file/libad.pdfIn PDF document text
    • https://riondene.ch/img/uploads/file/lagudezanadovegog.pdfIn PDF document text
    • http://bugaboo-buffalo.eu/UserFiles/File/damomazejanu.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/6171df2cf8ced3f8693c2ef1bfa05007/nozujudapimige.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ee2d09e9a5---11053172081.pdfIn PDF document text
    • http://2478.ru/admin/ckfinder/userfiles/files/30249691609.pdfIn PDF document text
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/rcmpg36ulc3q5tsbgvrcg4rvmm/ripalikimimaje.pdfIn PDF document text
    • http://foto-klub.dk/userfiles/file/5359170540.pdfIn PDF document text
    • http://bobas24.pl/Upload/file/22076219936.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606f09e97c534---62024731073.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079958bdc096---46225016653.pdfIn PDF document text
    • http://ylgems.com/file_media/file_image/file/97363101935.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160d4ebc9c8976---vajepelokunusa.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c93bf317e6c---78055520802.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071b5eb3d84a---39050272874.pdfIn PDF document text
    • https://planet-pvc.com/upload/files/72803078893.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b6618398a68---dipagibogodudakudori.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/0d10qamdmi29e413mairk4bo4g/98981469668.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=7+spirits+of+god+meaningPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001165d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1165D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012e74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E74 10748 bytes
SHA-256: 33b470307f8be6f37955f3bb662f1a020fd13e009985b37e14d37328d9aab745
font_02_sfnt_off000146fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146FD 26044 bytes
SHA-256: 209a8f574052c775d2ee2dbf37942944df7c9d7c1b09783e57192a62881c4712