Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c52607675572dda…

MALICIOUS

PDF

79.6 KB Created: 2021-07-27 18:42:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 810955579c0b4ab6b4664fd9d7b8cac7 SHA-1: a3328241c1a2bcedacc17f86e618eaa35d16626f SHA-256: 6c52607675572ddacba0c9258e133605652bb7df339691d967fae6e7219cf8e7
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file contains a link farm pointing to numerous compromised WordPress upload directories. The ClamAV detection 'Pdf.Phishing.Trojan' and the presence of multiple links to potentially malicious content indicate a phishing or malware distribution attempt. The document body is unreadable, but the heuristics strongly suggest a malicious intent to redirect users to external sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4964

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://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c0ab3aa2397---pezotepot.pdf In PDF document text
    • https://alrukn.co/userfiles/files/tabij.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609baadc7da07---xijotowijejeratof.pdfIn PDF document text
    • http://clair-environnement.eu/catalogue_dynamique/file/30224015764.pdfIn PDF document text
    • http://learningkey.org/userfiles/67343948995.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/p5m34m71nm4b4mgigmd2mnojo4/tetutuvarodefagok.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/1a2443a33038f97003b9c5b882c24662/79434796411.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/c75c05749a64456f7444bc8b07725874/93591131518.pdfIn PDF document text
    • http://geometracosentino.com/userfiles/files/40193047274.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160977239b3a9d---83236469562.pdfIn PDF document text
    • http://thingsantiquesla.com/userfiles/files/noguwegesoxakozi.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/bebca0022c7c00dddd342e736c9da24d/47825281975.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b847dfcbb8a---19903088477.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16082228db5fa8---tozufusixozosaxotomidojiw.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac253a7848---dodifusexizekafezosisej.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/8jift853hg4tk89eq25ormkpro/99843210782.pdfIn PDF document text
    • http://thucphamchucnangmy.vn/uploads/files/51210571284.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607838e8768a5---98747617646.pdfIn PDF document text
    • https://aiaciran.org/cache/fck_files/file/wopejaretelofam.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160ba96cc5450c---74398012191.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160fe30505f2bb---53815208028.pdfIn PDF document text
    • https://gimenezricarte-deltabogados.com/ckfinder/userfiles/files/tidefisitekaxejogajawuk.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/lajoresiwusog.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f4df590a5---jikibojogopeziziwurumi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=top+10+nba+point+scorers+all+timePDF link annotation
    • 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_off0000f64c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF64C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010e63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E63 10812 bytes
SHA-256: 1ec0992962b28c6ac4bab73f7410a993fe4623d9cb08a670c61925082785dd73