Malicious PDF — malware analysis report

Static analysis result for SHA-256 ace63db1822c19ea…

MALICIOUS

PDF

52.5 KB Created: 2021-09-27 18:34:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: eca5ce4a3c684530f4c57f50cb9f03c8 SHA-1: 76258a8cec775920eaaea8c244c25cd4904179f2 SHA-256: ace63db1822c19ea0ed33dfe6123675ee8a06f25cc81844ff72340b12fbf65a6
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is identified as malicious by ML classifiers and ClamAV, and it contains numerous embedded URLs pointing to external websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates these URLs are likely part of a phishing or spam campaign, aiming to redirect users to potentially malicious content. The presence of external URIs and the overall structure suggest an attempt to lead users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8792

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://smidgel.ru/uplcv?utm_term=gastorio+press+ltd+reviews PDF link annotation
    • http://insfilings.com/skyzone_classic/upload/files/25064722335.pdfIn PDF document text
    • http://rspon.pl/images/wyswig_images/file/22334141682.pdfIn PDF document text
    • http://mtsp.by/userfiles/files/dofex.pdfIn PDF document text
    • http://seidels-mineralienwelt.de/images/uploaded/file/49795397687.pdfIn PDF document text
    • http://www.koeru.eu/failid/file/tatefabomewetoxunekuza.pdfIn PDF document text
    • http://ipublicity.cz/data/file/95556014010.pdfIn PDF document text
    • http://dentalcenterstudio.it/userfiles/files/zalavitiselesinojo.pdfIn PDF document text
    • http://studiocommercialedelpiano.it/userfiles/files/fawami.pdfIn PDF document text
    • https://binarbaidtrading.com/public_html/userfiles/file/88580324514.pdfIn PDF document text
    • http://zjhywt.com/images/upload/File/65304801026.pdfIn PDF document text
    • http://congress.bpv.su/content/files/files/89008803127.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/dfaba3cd9737dff805860a293e81f815/wajugezozipijejivoxudul.pdfIn PDF document text
    • https://immsac.pe/sgi_userfiles/userfiles/files/38598540177.pdfIn PDF document text
    • https://villadelauca.com/userfiles/file/rotikegob.pdfIn PDF document text
    • http://teplospectr.ru/images/files/35974109816.pdfIn PDF document text
    • https://bostaninsaat.com/image/files/levot.pdfIn PDF document text
    • http://studioingegneramato.com/userfiles/files/21389554240.pdfIn PDF document text
    • https://conviviodihera.it/dati/upload/file/53438411463.pdfIn PDF document text
    • http://architettodrabeni.it/userfiles/files/dolezerikikipomer.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/16013742459.pdfIn PDF document text
    • http://jagdrevier.hu/upload/images/file/loxapewuxal.pdfIn PDF document text
    • https://gdaniec.com/upload/files/diroluxajirixofev.pdfIn PDF document text
    • http://minhphucvietnam.com/uploads/userfiles/file/jomirekajesinufoveva.pdfIn PDF document text
    • http://www.vikingmaterials.com/img/26157270022.pdfIn PDF document text
    • http://eg-connect.com/uploads/editorfiles/file///gozijoluvakubezuguboweg.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB381 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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