Malicious PDF — malware analysis report

Static analysis result for SHA-256 debf5695d89d871f…

MALICIOUS

PDF

80.3 KB Created: 2021-09-05 06:55:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: eb4ca6bc5de1017141a674042dcf6825 SHA-1: b99b735d83204f856564bbb0f09d33959ed1bf5d SHA-256: debf5695d89d871f852b407372bdad1888f9c24bebf7d747acc4e239b74937da
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs that point to compromised websites and disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a phishing or malware distribution intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with attempts to deliver malicious content or lead users to phishing sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3499

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://pistant.ru/uplcv?utm_term=witchery+embrace+the+witch+within+pdf PDF link annotation
    • https://rinducm1.com/contents//files/jabuwuludapanexog.pdfIn PDF document text
    • https://tigercabinetry.com/wp-content/plugins/super-forms/uploads/php/files/2f11222adb1e6306df4a77b75f65aa23/27233923226.pdfIn PDF document text
    • http://morebricks.com/ckfinder/userfiles/files/22423981176.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/o1g29hb1506i705t8lj424p1e1/nobije.pdfIn PDF document text
    • http://alexanderkanevskyartistbiography.com/clientMedia/file/zatekexud.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/160706582483b1---3653916707.pdfIn PDF document text
    • https://wemservice.com/ckfinder/userfiles/files/17722546740.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/16098a8e510100---gomunav.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/u6oov4qaal77o3nvsc3acea2iv/67250265679.pdfIn PDF document text
    • http://celcg.pl/uploaded/file/digefagis.pdfIn PDF document text
    • http://washchienluoc.com/upload/file/wesal.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c1e5b7c910c8f552506a8ba6b92ac17b/ruronewijejikatugu.pdfIn PDF document text
    • http://www.rify.us/cms-uploads/files/33043257258.pdfIn PDF document text
    • http://bradzo-ep.com/uploads/files/vesusaw.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/aa38f2268bb79c5b2f30b5a247b46515/10805696540.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d2cb03af31---80561726788.pdfIn PDF document text
    • https://shidoremicrosys.com/media/sigonitekizinawabega.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/cc4079b0f21a74e415574546f8277fea/tilaruj.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160878b9b328aa---43046399345.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae26ac4749b---90573283253.pdfIn PDF document text
    • https://sealskinz.ru/files/file/waxozujijujiwegobelanesu.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/eb08c23792d2944f7ef47b5165bfea08/vikonugakoda.pdfIn PDF document text
    • http://portaldeaquidauana.com.br/ckfinder/userfiles/files/nedadu.pdfIn PDF document text
    • 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_off000106b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B1 10884 bytes
SHA-256: f58d88cf96bd154f8bea1061b678f17ba0b88c6959430ac83e58befd2a589d4d
font_01_sfnt_off00011f88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F88 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1