Malicious PDF — malware analysis report

Static analysis result for SHA-256 33a3e49555e7685a…

MALICIOUS

PDF

67.9 KB Created: 2021-09-19 10:07:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: c13b2b91d990957ca65dfe3f5a050fe8 SHA-1: 2b0e37894e3dd40b25b4856cf7466b51b65e4808 SHA-256: 33a3e49555e7685a02308810a109347881e93eaebe2dd10a36c2d8c78db09165
102 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV with a 'Pdf.Phishing.Trojan' signature. It contains embedded JavaScript, indicating potential for malicious scripting. The PDF also functions as a link farm, directing users to numerous external URLs, many of which are hosted on disposable domains, suggesting a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2639

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://alternativecarrepair.com/userfiles/file/25407385686.pdf In PDF document text
    • http://wignaccent.com/FCKeditor_2.6.3/userimages/file/20210915020136.pdfIn PDF document text
    • http://af.ssla.ru/images/fornews/files/wivogo.pdfIn PDF document text
    • http://business-plan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/44955784633.pdfIn PDF document text
    • http://lacasedescaraibes.fr/file/36125790847.pdfIn PDF document text
    • https://gifarlcm.com/upfiles/editor/files/27691354897.pdfIn PDF document text
    • http://all-vehicle.net/js/upload/files/fugavibusoniraruranejizu.pdfIn PDF document text
    • http://wirheiraten.de/images/file/15673102792.pdfIn PDF document text
    • http://peggylittlelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/potofosunuxarer.pdfIn PDF document text
    • https://cargoservice.pl/cargoservice/userfiles/file/kunevetuvutugamut.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613bf8906279a---9830513022.pdfIn PDF document text
    • http://mobitransjogja.com/files/54824056200.pdfIn PDF document text
    • https://eletvital.hu/uploads/files/mapuvajorademiginusopot.pdfIn PDF document text
    • http://www.siposferenc.hu/html/1094520100.pdfIn PDF document text
    • https://almentispharma.com/ckfinder/userfiles/files/nutozononedod.pdfIn PDF document text
    • http://manenshop.com/upload/files/46171324604.pdfIn PDF document text
    • https://booking-news.hkdnracing.com/webroot/editor-uploads/files/80743672710.pdfIn PDF document text
    • https://vonia.mikludava.lt/images/files/5628772945.pdfIn PDF document text
    • http://vector-food.com/userfiles/file/72460174602.pdfIn PDF document text
    • https://seedcambodia.org/htdocs/cljr/data/files/legozezomujexetafiwer.pdfIn PDF document text
    • http://tonyprins.nl/images/uploads/file/88071897170.pdfIn PDF document text
    • https://lmetinternationalschool.in/ckeditor/ckfinder/userfiles/files/37193296321.pdfIn PDF document text
    • http://placc.info/up_image/sewuxafojifuniletifo.pdfIn PDF document text
    • http://atrsara.ir/resource/files/43449750739.pdfIn PDF document text
    • https://stephankeppel.com/userfiles/file/bokugidetamonaxafu.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/22886170764.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=hero+strike+offline+mod+apkPDF 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_off0000dd72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD72 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f589.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF589 10740 bytes
SHA-256: 867a71d53084b1e7c3ccd07ef6c2badda17b78e8f1f5b583f4406a2bbcc22556