Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f3094f666670606…

MALICIOUS

PDF

72.4 KB Created: 2021-09-18 13:38:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: bdb558574d66423f49ffc6e0c9b49d1d SHA-1: b8d083548ae15c43d63e250ff64f2a9f7f672b1f SHA-256: 9f3094f6666706061334b54527d2d3cc19ee6978462006eefe1ee94d8366ba1d
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by heuristics as a link farm. ClamAV detection and ML classification indicate malicious intent, likely for phishing or distributing further malware. 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 0.9947

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 http://vasset.bg/userfiles/file/97617955616.pdf In PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/78bbe21012794d9bb00befcd09ea4bf6/pufidusaxerubidapoweradur.pdfIn PDF document text
    • http://rlponder.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/28453679764.pdfIn PDF document text
    • http://gps-ambroisie.com/ressource/site-image/files/nanegupokakifosi.pdfIn PDF document text
    • https://officialbacknumber.org/editor_up/73498050088.pdfIn PDF document text
    • https://certifiedcollisionrepair.com/home/cert/public_html/ckfinder/userfiles/files/tevavuxokupel.pdfIn PDF document text
    • http://teranor.com/ckfinder/userfiles/files/tenekodazulomukibevizezo.pdfIn PDF document text
    • http://revucue.com/ckfinder/userfiles/files/menopufoduzubitunefigeta.pdfIn PDF document text
    • https://yumasri.com/assets/ckfinder/userfiles/files/71955006847.pdfIn PDF document text
    • http://phutungtdc.com/upload/files/46755511193.pdfIn PDF document text
    • http://boxshop.mn/userfiles/files/jaribiwupuwip.pdfIn PDF document text
    • http://teplorium.su/userfiles/file/80516408504.pdfIn PDF document text
    • https://chineseclothingonline.com/File/goduzelopovijesaxinu.pdfIn PDF document text
    • https://franchisebusinessadvisors.franchisebrokerwebsites.com/broker-site/files/files/sulewumobetonaziwivikeda.pdfIn PDF document text
    • http://trubaopt.ru/content/file/wipuxomazunovupomeji.pdfIn PDF document text
    • http://linklandhotels.com/upfile/editor/files/xawetexime.pdfIn PDF document text
    • http://logenamerica.com/userfiles/file/78161224549.pdfIn PDF document text
    • http://mercuresamuichaweng.com/admin/file/nosipura.pdfIn PDF document text
    • https://beamstraffic.com/amb/userfiles/file/50015194107.pdfIn PDF document text
    • http://dtpokebar.com/uploads/files/sugekipifetibinanojero.pdfIn PDF document text
    • https://dcmheavyequipment.com/admin/images/file/52860482927.pdfIn PDF document text
    • http://workontext.ru/media/file/mefukujexatenifowevixega.pdfIn PDF document text
    • https://sibservis.com/ckfinder/userfiles/files/59674048328.pdfIn PDF document text
    • https://vidaleve.ind.br/ckfinder/userfiles/files/bonefamupidajunitijufim.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134020819f95---repurumipel.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+turn+off+cookies+on+androidPDF link annotation
    • 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_off0000ba53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA53 16032 bytes
SHA-256: 5e8dcded54021d48b39aa43166ac7c810f3c11e0f9169d3886e744ec0ec8618f
font_01_sfnt_off0000e34b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34B 10692 bytes
SHA-256: d02f9b592478e3aa456a315ae7247d590e1a2dada8198a6064bf71c0bee315d8
font_02_sfnt_off0000fc05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC05 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1