Malicious PDF — malware analysis report

Static analysis result for SHA-256 73f08d35a32e0672…

MALICIOUS

PDF

80.8 KB Created: 2021-09-10 14:32:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9849415a584a8d9fafb3ae7aa3d86f6e SHA-1: edc6cbedaf6d9e6a5c9762dcf44f13ab2451f717 SHA-256: 73f08d35a32e0672adab191fb2f87cbf1b158e82705ce5da1c87a6c4f2ef8d81
126 Risk Score

Malware Insights

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

The sample was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous embedded URLs pointing to external domains, with one heuristic specifically identifying it as a link farm on disposable hosting. The presence of these links suggests an attempt to redirect users to malicious websites for phishing or to download further malware. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 5

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://garglob.ru/uplcv?utm_term=incredible+hulk+wallpaper+for+android PDF link annotation
    • https://amatnieks.lv/pictures/image/26684046565.pdfIn PDF document text
    • http://reliancefla.com/admin/images/file/gilobasitupalupimexoxuwi.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/5719097772.pdfIn PDF document text
    • http://trufeel.com/ckeditor/ckfinder/uploadfile/files/39289363429.pdfIn PDF document text
    • http://kodemari.info/data/files/72176278443.pdfIn PDF document text
    • https://hijaustabilo.com/contents/files/dobifasotuwejisisivopusuj.pdfIn PDF document text
    • http://gma.ge/admin/ckeditor/ckfinder/userfiles/files/74667002281.pdfIn PDF document text
    • https://cobrawire.com/userfiles/files/7543919008.pdfIn PDF document text
    • http://119pump.net/d/files/61613277095.pdfIn PDF document text
    • http://www.saveurspoitoucharentes.com/admin/ckfinder/userfiles/files/lunefujofuwajopalos.pdfIn PDF document text
    • http://propertiesforrent.com/userfiles/file///61325472395.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613522250c300---65644962263.pdfIn PDF document text
    • http://bsa-billiard.by/images_from_html_editor/file/telipinorabupoz.pdfIn PDF document text
    • https://bcbc3399.com/upload/files/katawilabuwuvetojizopagu.pdfIn PDF document text
    • https://fond.ru/userfiles/file/25603639738.pdfIn PDF document text
    • https://betentour.com/sites/default/files/file/64594262616.pdfIn PDF document text
    • http://tivatijapan.com/uploads/userfiles/file/favotebigakozolot.pdfIn PDF document text
    • https://gencshoworganizasyon.com/upload/ckfinder/files/63346151322.pdfIn PDF document text
    • http://gidromall.ru/img/uploads/file/buzodikilazogaxapikipen.pdfIn PDF document text
    • http://posuni.com/userfiles/file/35675221542.pdfIn PDF document text
    • https://jmclimatizacionhvac.cl/images/subidas/file/tetonekalijede.pdfIn PDF document text
    • https://weishinclinic.com/uploads/files/202109021521283428.pdfIn PDF document text
    • http://www.impactit.in/ckfinder/userfiles/files/18189166074.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD510 10820 bytes
SHA-256: f70a40da909754efb200fd64aeb181296389d644eb3a5aa668f65a32c6b6c10a
font_01_sfnt_off0000edb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB3 18368 bytes
SHA-256: 2c999d4dd91df663e42141dc92ec0a4536f4d53f094f1aafe7a1bcc072d6c454
font_02_sfnt_off00011d98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D98 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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