Malicious PDF — malware analysis report

Static analysis result for SHA-256 37ffa82cf3ac3569…

MALICIOUS

PDF

62.3 KB Created: 2021-09-11 08:04:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-03
MD5: 7e1e1653c8c15eddda30470fbcfd7304 SHA-1: 87e215bc1a1c6cd9ef0b2325001552cff297e737 SHA-256: 37ffa82cf3ac3569029d7325ce9b2f98e68f378d29c346400e94bacc5e19a28a
64 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by an ML classifier as malicious. It contains numerous embedded URLs, many of which point to disposable domains, and is identified as a link farm. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure suggests an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7651

Heuristics 3

  • 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://www.playitdirect.ca/ckfinder/uploadfiles/files/48632571358.pdf In PDF document text
    • http://fra2ange.it/userfiles/files/fetukoxakiborimel.pdfIn PDF document text
    • http://ahdjcm.com/upload/files/wugokopelexik.pdfIn PDF document text
    • http://webmba.fr/client/logo/file/90640205603.pdfIn PDF document text
    • http://bedrucken24.de/userfiles/file/guteler.pdfIn PDF document text
    • http://elma-itc.ru/!upload/files/82455342907.pdfIn PDF document text
    • http://arrhythmiaclinic.com/userfiles/file/20210908233029.pdfIn PDF document text
    • https://turismo-galicia.es/ckfinder/userfiles/files/ziparosu.pdfIn PDF document text
    • https://profitaler.com/UserFiles/file/91280258641.pdfIn PDF document text
    • https://vcvscr.cz/www/www/fckphotos/file/32753670053.pdfIn PDF document text
    • http://www.css-jp.com/upfile/files/2021/09/11/rokigixefebidixa.pdfIn PDF document text
    • http://nagyberki.hu/sites/default/files/fck_uploads/file/kesemurukesiwuvuvokimabof.pdfIn PDF document text
    • http://donovaly-ubytovanie-safran.sk/web/userfiles/file/pogukolexuwolajemufipumi.pdfIn PDF document text
    • http://jinsonmetal.com/Upload/file/vobesi.pdfIn PDF document text
    • http://alkanboya.com/files/file///24170079989.pdfIn PDF document text
    • http://wakesup.org/userfiles/file/bixezidoligez.pdfIn PDF document text
    • http://majorpropertygroup.com/userfiles/files/lutirasimupuweviri.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/52caf7b86654e8ef5ef35a6638fbd479/31260115725.pdfIn PDF document text
    • http://lukoilmarine.com/ckfinder/userfiles/files/tafasugaxabafejowexomitaz.pdfIn PDF document text
    • http://uslugi-ogrodnicze.pl/pliki/File/ligasokezuvizenipafuwilo.pdfIn PDF document text
    • http://wxmx.cn/upload/ckimg/files/202109032214276553.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=gta+5+apk+sizePDF link annotation
    • 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_off0000e427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE427 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1