Malicious PDF — malware analysis report

Static analysis result for SHA-256 de6ad95752771496…

MALICIOUS

PDF

67.1 KB Created: 2021-09-30 13:06:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 8db1d73b887e16ede620dd9063491d8c SHA-1: fc28a656281a382d7dc553417980dd3d8ab861b9 SHA-256: de6ad957527714965cc75a137d3d95d18ec3ca63083aebb6885abfd9af1cddbd
124 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to unknown or potentially malicious domains, suggesting a phishing or malware distribution attempt. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating the document is designed to host a large number of links, likely to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6872

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://epagneuls-bretons.fr/caningest/images/file/jupedel.pdf In PDF document text
    • https://webbsoil.com/home/webb/public_html/ckfinder/userfiles/files/43780805791.pdfIn PDF document text
    • https://migger.dk/userimages/file/guxujaziwegasokibixak.pdfIn PDF document text
    • http://huerural.com/uploads/image/files/33704068288.pdfIn PDF document text
    • http://iltorg.ru/upload/file/jusosisesifikela.pdfIn PDF document text
    • http://www.binghan.my/userfiles/file/68313734275.pdfIn PDF document text
    • https://www.sexualaufklaerung-schule.ch/ck/ckfinder/userfiles/files/44392264409.pdfIn PDF document text
    • http://englandmatchshirts.com/assets/file/verinumowexo.pdfIn PDF document text
    • http://www.niceresidence.net/image/upload/File/vagumewenamexabuwolov.pdfIn PDF document text
    • https://0900107678.com/upload/file/xefetu.pdfIn PDF document text
    • http://dijladentalcenter-qa.com/userfiles/file/37459614822.pdfIn PDF document text
    • https://ipic.vn/userfiles/file/13992038907.pdfIn PDF document text
    • http://sabaparsian.com/ckeditor/files/files/44775532124.pdfIn PDF document text
    • https://atlaskvartir.ua/data/uploads/files/ruxivonefuburogelutozi.pdfIn PDF document text
    • http://silarperu.com/UserFiles/file/tasumimuzitafigedefobu.pdfIn PDF document text
    • https://lrsdev.com/userfiles/file/namize.pdfIn PDF document text
    • http://thai-apsproducts.com/file_media/file_image/file/jokilejixuna.pdfIn PDF document text
    • https://cmflower-kkc.com/ckfinder/userfiles/files/durakutolisixulibagak.pdfIn PDF document text
    • http://maszyny.pl/userfiles/file/fururuwidukam.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/4273c7c3f2e5fce875260be33476eaa1/nizimibizutivafikema.pdfIn PDF document text
    • https://biomisszio.hu/tmp/nuronafij.pdfIn PDF document text
    • http://ageddfjtjgrade.pretty-match.com/upload/files/32877752298.pdfIn PDF document text
    • https://aymsoft.us/aym_image/files/62088930233.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=android+open+source+file+explorerPDF 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_off0000b61f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB61F 19344 bytes
SHA-256: e85824bc4e91676d0726ab7a7002d45a716a01374aa29769ebee31e53bb8ed14
font_01_sfnt_off0000e897.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE897 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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