Malicious PDF — malware analysis report

Static analysis result for SHA-256 025f4ccfd917f60a…

MALICIOUS

PDF

95.3 KB Created: 2021-07-14 01:42:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c837003e994bbfdff6c33716fb4420a6 SHA-1: d5db229a8e53df5e9dd9d43bb93e8b77828fa6a1 SHA-256: 025f4ccfd917f60a5da9c398526c7d1283aee4c275c32ce699130b7c4268edbe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple external URLs, many of which are hosted on compromised WordPress sites. The primary function appears to be redirecting users to potentially malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

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://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160afb6494aedb---87942804904.pdf In PDF document text
    • http://nanoscopy.ru/uploads/files/tarajonazedawadetaz.pdfIn PDF document text
    • https://autonoleggioassereto.com/file/vubutisowefesidud.pdfIn PDF document text
    • https://shopinhome.com/ci/userfiles/files/72220163293.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/472bb1c9bee85f0dac7e382bd783f4a4/lopolirul.pdfIn PDF document text
    • https://tecnibat.net/uploads/archivos/libalabiranixagobit.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/givaxifajepixelizijelagon.pdfIn PDF document text
    • http://xn--9d0b102a6wc3y4a.com/sa_upload/userfiles/file/20210702081708.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/16092f3c942b83---67748250780.pdfIn PDF document text
    • http://valdhans.cz/userfiles/file/79089985311.pdfIn PDF document text
    • http://hongshengfish.com/uploadfiles/20210630/210630103409139248gcup4h75jc5p.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/92e69ee805e30ef50a39687306da7da9/badafusojamulalizimodilaf.pdfIn PDF document text
    • http://hoitruyengiaocodocvietnam.com/uploads/image/files/motadopujabod.pdfIn PDF document text
    • https://wemservice.com/ckfinder/userfiles/files/77860493565.pdfIn PDF document text
    • http://easternhoteljeju.com/FileData/ckfinder/files/20210609_E595CBC69EFE539F.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/577f835030b9a3f9e6f20dbcd66ac54b/dulotevowukepape.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/miig35v264n190a8vdplfhirqa/jeditejix.pdfIn PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16078437e66160---13445115167.pdfIn PDF document text
    • http://maxidmum.com/images/upload/fck/file/bojebuw.pdfIn PDF document text
    • http://bachova-terapia.sk/images/file/80085242127.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/16074fa27650bd---wilanuropibazibu.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cafcf2093d6---lorawumitobuk.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/f1822b986c0b88fc624dd6bdc098dcb8/zubakabuwowaninovefu.pdfIn PDF document text
    • http://capitaldanceacademy.com/userfiles/files/zikim.pdfIn PDF document text
    • http://snailgame.ru/upload/files/20210709152011.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=sim+not+supported+iphone+7+plusPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF301 17864 bytes
SHA-256: 8a892dbe9f9e5bc989a459c3faeafc107279b2e351a7db2c5c45b7f6cd1b6a48
font_01_sfnt_off00010ed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ED6 18036 bytes
SHA-256: 0f30ee630ffcc827efded83f66b59ab0064c9de0a27225bdad1adab5d0ed1799
font_02_sfnt_off00013e7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E7A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00015691.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15691 10720 bytes
SHA-256: 3c54e3a13a72f12d1b65a03ad100777f4b1e59fd03b359bcdc84e07b7114abbf