Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4bef9c4be934514…

MALICIOUS

PDF

72.0 KB Created: 2021-09-06 10:30:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ee21cc16b8afe8e9ef758302428c95d3 SHA-1: a348ec936e6dbe23ab95bdf14288619e0ff804e9 SHA-256: d4bef9c4be9345146efc3cc55f02a07e1051ca2adece7aa21c66cd8e01d811c7
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links, many pointing to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the structure and URL patterns are consistent with malicious PDF lures.

Machine Learning

  • Nyx PDF Classifier clean score 0.2381

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 http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b7cc9872b51---73080230478.pdf In PDF document text
    • http://pphu-joanna.pl/fckpliki/file/53098042549.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c228e1c68d3---ritelezatomapozawa.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/zosufegekoxawowokulapa.pdfIn PDF document text
    • https://zerling.eu/nico/images/files/19427697268.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/230d3ed7d9502678d91edd2d1d00edf9/37028579194.pdfIn PDF document text
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/90039e115609acb2006f8bc7c8b457e7/xukimaxajosogitaxalifesok.pdfIn PDF document text
    • http://becskeicsodajo.hu/admin/fck_upload/file/pejuvubarizulezo.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/luj8gf2f0rl50ab4aa3mt33vvt/68662818657.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/d99ddffc06714e25195ddac6c01bc8bf/85868422834.pdfIn PDF document text
    • http://zbraneklapka.cz/ckfinder/userfiles/files/palizibuno.pdfIn PDF document text
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/8e51ij2vspl6c8c1uj86eujo51/58412163639.pdfIn PDF document text
    • http://finpacecuador.com/userfiles/file/62093663345.pdfIn PDF document text
    • http://polipadel.com/userfiles/file/dotuxisewiduk.pdfIn PDF document text
    • http://lowndes85.com/clients/d/d3/d39312ffd46aa2fbcc4e4de04d96a17f/File/27492408832.pdfIn PDF document text
    • http://creativetechno.in/userfiles/file/wikexi.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/fdebebf19961275a53992e7cae73b128/mukefoki.pdfIn PDF document text
    • http://trivio.it/userfiles/files/xonelitekopebojerub.pdfIn PDF document text
    • http://korea-seals.com/ckfinder/userfiles/files/58428622906.pdfIn PDF document text
    • http://www.cafeinca.com/img/public/contenido/file/29234334455.pdfIn PDF document text
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/8ianqgiu573ks516jni4uj6io1/rutedojifejefozesob.pdfIn PDF document text
    • http://ulrike-mayer.de/userfiles/files/87168800338.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac21678955---87092388099.pdfIn PDF document text
    • http://p-itos.net/admin/userfile/image/file/nifilefigim.pdfIn PDF document text
    • https://perfecthospital.org/ckfinder/userfiles/files/35827853899.pdfIn PDF document text
    • https://isabellepieman.com/userfiles/file/54209399271.pdfIn PDF document text
    • http://smclassof57.org/clients/34860/File/80488891295.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=odysseus+and+the+cyclops+story+pdfPDF 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_off0000e80d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE80D 10864 bytes
SHA-256: f128c576b3c8ae73c33cbc0cda7cb727ca085f7322c9e1eb19cba9ac56c30952
font_01_sfnt_off00010129.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10129 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1