Malicious PDF — malware analysis report

Static analysis result for SHA-256 51f4c10085ee040b…

MALICIOUS

PDF

53.3 KB Created: 2021-09-08 23:42:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 4ac54184ed27dcce9b1180812d6df054 SHA-1: 496c175f460aa55a963bfc7a57e869a9372158ff SHA-256: 51f4c10085ee040bba2d31762c18ad9a7e61c691b667fc48c3f9fc2ea6324452
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm, suggesting a phishing or malware distribution scheme. The ClamAV detection and ML classifier further indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing lure, likely attempting to redirect the user to a site that exploits vulnerabilities or hosts further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5755

Heuristics 4

  • 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.
  • 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://robertwestlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/81430203902.pdf In PDF document text
    • https://esprimagroup.com/userfiles/file/lopapovegaratofunudibor.pdfIn PDF document text
    • http://pk.mo/userfiles/file/furazokevor.pdfIn PDF document text
    • https://weishinclinic.com/uploads/files/202109030245342325.pdfIn PDF document text
    • https://macauroommate.com/ckfinder/userfiles/files/29635996854.pdfIn PDF document text
    • http://cheliabinsk.realxenon.ru/uploads/files/26790783140.pdfIn PDF document text
    • http://gemmacapitalgroup.com/foto/file/fekos.pdfIn PDF document text
    • https://pchome.uzai.ca/upload/files/5186353348.pdfIn PDF document text
    • https://glaskunstcentrum.nl/images/file/89201049868.pdfIn PDF document text
    • http://gtlitalia.com/userfiles/files/86598008206.pdfIn PDF document text
    • http://dywin.com/uploadfile/files/wipazofiboluzonapanuworo.pdfIn PDF document text
    • http://jandenzobv.com/image_uploads/file/kotovekaxelibudijodel.pdfIn PDF document text
    • http://terezmisszio.eu/files/file/renobas.pdfIn PDF document text
    • http://haiannweb.com/uploads/files/xikemelotisotej.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/1c5f437d6eebee3d1d9d76a34927b37a/raruzetopum.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613109e5338b1---kovat.pdfIn PDF document text
    • https://rent-1.es/ckfinder/userfiles/files/20875295550.pdfIn PDF document text
    • http://mh-gartengestaltung.de/userfiles/file/xefudesaj.pdfIn PDF document text
    • http://phanmemerp.vn/attachment/files/molekup.pdfIn PDF document text
    • http://zhuoer.ltd/userfiles/file/10787384964.pdfIn PDF document text
    • https://landtop.com/filespath/files/20210907190349.pdfIn PDF document text
    • http://www.corazondelsol.es/ckfinder/userfiles/files/7702234397.pdfIn PDF document text
    • https://pima-alarms.net/slicice/file/nufarifexitogifupi.pdfIn PDF document text
    • http://meghdoothsuzuki.com/uploads/77459477072.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=android+system+updatesPDF link annotation