Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d1dd0c4ae55306a…

MALICIOUS

PDF

62.5 KB Created: 2021-10-02 23:55:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: f1efc0373e172845d47e9ec8b8358173 SHA-1: 8bceb6bbe449184760eb23ae6d23e3765412cc45 SHA-256: 3d1dd0c4ae55306a17000ac669a40a174f806faa4f54afc462ebd44ff31b37ef
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, indicating a phishing or malicious redirection scheme. ClamAV and ML classifiers also flagged the PDF as malicious. The presence of external URIs and the overall structure suggest it is used as a lure to direct users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5233

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://oniceh.ru/uplcv?utm_term=sat+practice+6+answers PDF link annotation
    • http://savages.lu/imagesRTE/files/757478475.pdfIn PDF document text
    • https://anitt.in/ckfinder/userfiles/files/jaworikizemefagijewi.pdfIn PDF document text
    • https://synodradomski.pl/userfiles/file/jexubiwojikomipavi.pdfIn PDF document text
    • http://pro-roubenky.cz/UserFiles/File/jowewefewadupizarajoregab.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/furetezama.pdfIn PDF document text
    • http://eko-uklid.com/files/file/28531811144.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/161581c37e955c---gajeraxejowosuwajuxereje.pdfIn PDF document text
    • http://auswallendorf.de/userfiles/file/monodegilom.pdfIn PDF document text
    • http://distant-property.ru/fck_editor_files/files/87443190964.pdfIn PDF document text
    • https://planbmedia.hu/files/pozozodo.pdfIn PDF document text
    • http://ryyw.com/upload/files/2021/09/202109101959373323.pdfIn PDF document text
    • http://tccsrl.org/userfiles/files/36563167510.pdfIn PDF document text
    • http://tridiart.cl/ckfinder/userfiles/files/86959780746.pdfIn PDF document text
    • http://bindashnews.com/userfiles/file/72427443202.pdfIn PDF document text
    • https://global-product.org/CKEdit/upload/files/52604812353.pdfIn PDF document text
    • https://www.albriug.com/static/editor/ckeditor/ckfinder/upfile/files/vifajinofepepunikofabigir.pdfIn PDF document text
    • http://f1-rennsimulatoren.de/userfiles/file/34140225876.pdfIn PDF document text
    • http://oasis-inwaste.asia/files/file/53876529852.pdfIn PDF document text
    • http://giprozdraw.ru/ckfinder/userfiles/files/62067555506.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/5b44a985d1b8d1d4661ab74dfdf68927/59807869132.pdfIn PDF document text
    • https://asoriofrio.org/ckfinder/userfiles/files/damelajogajurudere.pdfIn PDF document text
    • http://crmrealty360degree.in/ci/userfiles/files/95486334024.pdfIn PDF document text
    • 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_off0000bfcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFCD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d7e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E4 10532 bytes
SHA-256: 5d71761c1fae903b1a000d8acb096f81474458014e914c8e93a528d633295172

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