Malicious PDF — malware analysis report

Static analysis result for SHA-256 dece40af9c7630c4…

MALICIOUS

PDF

81.8 KB Created: 2021-09-12 01:23:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2bdaf9962ef9625569375cbc2642e102 SHA-1: 3605b24e7562fbf40144e738ca0949de6a5870d4 SHA-256: dece40af9c7630c4d4cbe7dccfbd2b077090b4de37a9b209a541762a7c9b1097
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm, a common tactic for phishing or malware distribution. The ClamAV detection and ML classifier further indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5017

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 http://tbm-mova.by/images_from_html_editor/file/jukewedixemowolof.pdf
    • https://thefertilizergranulators.com/d/files/godorefavejaminonabawutaz.pdf
    • http://floridadressyourhome.com/uploaded_files/userfiles/files/mobafekutomila.pdf
    • http://wixoon.hu/upload/file/94253510282.pdf
    • http://flixgolf.com/ckeditor/ckfinder/userfiles/files/kisopoparigapuluxurasu.pdf
    • https://tp-pos.com/uploads/image/files/13310392858.pdf
    • https://universitecentrale.net/uploads/FCK_files/file/34929441291.pdf
    • http://vasset.bg/userfiles/file/10863076733.pdf
    • http://kechengchem.com/upload/files/mideju.pdf
    • https://fceresources.com/ckfinder/userfiles/files/peguzevovagefimefuzozo.pdf
    • http://builderall.info/userfiles/file/85139173597.pdf
    • https://ltes.tw-goods.com/UserFiles/files/xusibogawoj.pdf
    • https://didacostruzioni.it/userfiles/file/63901536112.pdf
    • http://www.azurwelcomeservices.com/userfiles/file/91841023850.pdf
    • http://razaviota.ir/basefile/razaviotair/files/2592101137.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/34bf40e509a550ea793f2f0d317f79a9/migafokesiwujizomalufik.pdf
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16136372cb310d---48267688578.pdf
    • http://vce34.ru/attachments/file/32363768443.pdf
    • http://lachambredechos.com/userfiles/file/naxefumapise.pdf
    • http://infinity-c-t.com/userfiles/file/lesajuwikotuwelomunewuz.pdf
    • http://drprdesaihospital.com/uploads/wonobawetewusafepije.pdf
    • https://benqmusicworkshop.com/fupload/file/nirimul.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=bloons+td+coolmath
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7a2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A2 16792 bytes
font_01_sfnt_off0000ffb4.bin
81b7ab8481a921571df9cb6bd3d9213d66f3a0088afbc15f0d66e91d33580da6
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB4 23060 bytes