Malicious PDF — malware analysis report

Static analysis result for SHA-256 07b55cd6afdf4922…

MALICIOUS

PDF

72.5 KB Created: 2021-10-01 02:20:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7ba037cb56df77a6a60e8c85bf909b62 SHA-1: a6f696bb6ae2271bf088988d70d6346ecca48739 SHA-256: 07b55cd6afdf4922b1b012ae30a000929a26e5a642c77bdb9b1663965a3ebe32
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan delivery mechanism. It contains numerous embedded URLs pointing to potentially malicious PDF files hosted on various domains. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using many links on disposable hosting, suggesting an attempt to obscure the true malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fujavietnam.com/images/Download/tugagenotowubek.pdf In PDF document text
    • http://thueotodn.com/uploads/image/files/27070455409.pdfIn PDF document text
    • https://pagodatalk.com/_UploadFile/Images/file/37492244181.pdfIn PDF document text
    • http://ivankotov.ru/img/lib/file/zeguposo.pdfIn PDF document text
    • http://tangneylaw.com/admin/images/file/kifufavax.pdfIn PDF document text
    • http://cottoneauto.it/userfiles/files/12095745328.pdfIn PDF document text
    • http://mrs724.ir/basefile/drtiketcom/files/xowadulij.pdfIn PDF document text
    • https://tselectromechanical.com/uploads/CKfiles/files/31480304724.pdfIn PDF document text
    • http://crisismobile.com/ckfinder/userfiles/files/28576228648.pdfIn PDF document text
    • https://nbcmedia.vn/ckfinder/userfiles/files/winijewogileboj.pdfIn PDF document text
    • https://firesystem.ro/imagini_ws/15152766088.pdfIn PDF document text
    • http://poledance-chrudim.cz/files/file/81202069326.pdfIn PDF document text
    • http://www.radanhorse.com/resource/files/54100497617.pdfIn PDF document text
    • http://omgmediatank.com/userfiles/files/87703250985.pdfIn PDF document text
    • http://www.centralperdana.com/file/13972347816.pdfIn PDF document text
    • http://xinshifm.com/userfiles/file/mimit.pdfIn PDF document text
    • http://matraholding.hu/images/userfiles/files/92268371504.pdfIn PDF document text
    • https://peusch.lu/userfiles/files/ziwat.pdfIn PDF document text
    • http://movitecnic.fr/ressource/site-image/files/88649380340.pdfIn PDF document text
    • http://mobiliteit.nu/files/63420518609.pdfIn PDF document text
    • http://studiolorenzino.eu/userfiles/files/jifanuwan.pdfIn PDF document text
    • https://hotelpancharatna.com/assets/userfiles/files/jurujamedut.pdfIn PDF document text
    • http://abc-tel.ru/data/File/vukavupib.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=kingroot+pokemon+goPDF 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_off0000b69d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB69D 18108 bytes
SHA-256: 88e61bcbc9681f0bf357a681041496db243c91cfd0bba9d6594d6edc65bf8dfa
font_01_sfnt_off0000e51a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE51A 10300 bytes
SHA-256: aaeccda41a8ec8fd9f71f73e1af438244d64fee5ca3d68a44ea45b455ccf2709
font_02_sfnt_off0000fc44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC44 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.