Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9aa2f310c044658…

MALICIOUS

PDF

73.5 KB Created: 2021-08-20 18:09:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b014cd987f5b15f9ca89dd2c22b5d3fa SHA-1: c4d81b0a760d5a80b2023bc1dd544146e5acc237 SHA-256: e9aa2f310c0446586decfa4914bda5b21c5ee6cf40f7e700e8f6dadd58876544
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains numerous links to external websites, many hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body is heavily obfuscated and unreadable, but the presence of external URIs and the overall structure point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5898

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://cructi.ru/uplcv?utm_term=evaluation+de+la+boite+a+merveille+chapitre+1+corrig%C3%A9+pdf PDF link annotation
    • https://peptidturkiye.com/ckfinder/userfiles/files/koruwowozezi.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c293612c6e6---jepegubufolaf.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/544e6ntdn8ouj3m1cmua9n76lt/dupojovafufuvuz.pdfIn PDF document text
    • http://bethanybaptistcolumbus.org/clients/75549/File/44602232387.pdfIn PDF document text
    • https://smobiil.eu/userfiles/files/lazavejijug.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee1211bbb5---kijolisevimidov.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160bd04e419537---73070670120.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210612185702414.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/1o4mosrft16japnkltnqs8n2ed/jakifura.pdfIn PDF document text
    • https://b2cexpressdemo.com/userfiles/file/86063553383.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094645007f96---20315558614.pdfIn PDF document text
    • https://by-express.com/upfiles/editor/files/nalixifituxonisesanubogaj.pdfIn PDF document text
    • https://castel.ro/userfiles/file/82578395752.pdfIn PDF document text
    • http://sgrappresentanze.eu/userfiles/files/xezarozawepowuga.pdfIn PDF document text
    • http://jonme.net/ckupload/files/44510778446.pdfIn PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/790098652242d4a90e548929a56f8515/kovejulevalomeru.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609600c766e79---pavutalurewobirizevapuwe.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abaacc0a4f8---benapenu.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/9b8961836f88490e12712ff7f0b3c0e7/77171100270.pdfIn PDF document text
    • http://csc0351.com/userfiles/file/20210807162817_ll8365.pdfIn PDF document text
    • https://balaji-technology.com/userfiles/file/55797310135.pdfIn PDF document text
    • http://riverla.vn/uploads/userfiles/file/kigovuz.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16098475bf288c---28173020219.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_off0000db74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB74 11392 bytes
SHA-256: 5d48acf7b39a2ce584dbd134876fb18a366719aad88a134ef169ac12b16b3628
font_01_sfnt_off0000f56b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF56B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1