Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e9205b893d1ce05…

MALICIOUS

PDF

75.8 KB Created: 2021-09-17 04:47:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 329fabc97899ef30ed2e437f383d76e0 SHA-1: d30976df4c450f85e26d4b6e9e4be01b8beab0a7 SHA-256: 3e9205b893d1ce05591adff513dcb0ede0239667ef4ea2b54f127194b09e4c8d
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to a link farm hosted on disposable domains, a common tactic for phishing or malware distribution. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic and the high ML score strongly indicate malicious intent. While no scripts were explicitly extracted, the structure and URL patterns suggest an attempt to redirect users to malicious content, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://baikalspring.ru/ckfinder/userfiles/files/55749297122.pdf In PDF document text
    • http://nofatrans-int.com/userfiles/file/vezuti.pdfIn PDF document text
    • http://weilandvloeren.nl/fckimages/tipidaruwetowariroxu.pdfIn PDF document text
    • https://irish-setter-zucht.info/ckfinder/userfiles/files/webekixejiwol.pdfIn PDF document text
    • http://tatugigo.com/ckfinder/userfiles/files/jumamulaxepizevupogip.pdfIn PDF document text
    • http://medicaldistri.com/ckfinder_files/files/tarivawiva.pdfIn PDF document text
    • http://floramarble.com/uploads/rokaxolam.pdfIn PDF document text
    • http://apismorava.eu/docs/50402030264.pdfIn PDF document text
    • https://intrigantka.ru/images/userfiles/file/suzibijogegomizivozusefe.pdfIn PDF document text
    • http://seamcc.com/UserFiles/files/tivivadanizazoguje.pdfIn PDF document text
    • https://wic-net.com/userfiles/file/57975499325.pdfIn PDF document text
    • http://think6.net/ckfinder/userfiles/files/20210910160611.pdfIn PDF document text
    • http://hoaisonland.vn/upload/files/wawumerom.pdfIn PDF document text
    • https://livewireeventz.com/userfiles/file/89898234099.pdfIn PDF document text
    • https://promaxsuspension.com/csmimage/file/59201717485.pdfIn PDF document text
    • https://cplastik.com/data/cms/file/jezifag.pdfIn PDF document text
    • https://airbays.com/userfiles/file/42640320175.pdfIn PDF document text
    • http://grandioso.asia/editor_upload_image/file/xaboledarufebafiregoxilav.pdfIn PDF document text
    • http://gioiacompany.net/images/upload/file/21741778544.pdfIn PDF document text
    • http://copy-office.it/userfiles/file/tojubuxowidadodavi.pdfIn PDF document text
    • https://triatlonshop.cz/userfiles/file/50169793331.pdfIn PDF document text
    • http://akvatoria.by/UserFiles/files/dakapemalekuvowajedomibep.pdfIn PDF document text
    • https://h1t-url12shio-turbo.com/contents/files/dodemumidoluwulaxotulelok.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613e07de49639---rabujud.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=inshot+video+making+appPDF 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_off0000c4f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dd0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD0A 10800 bytes
SHA-256: 7a57a5666435e483318d9324a36c310001b25dfdecf861a0bcc77baf8b7d4993
font_02_sfnt_off0000f58d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF58D 16948 bytes
SHA-256: cc7a5dabf32f4fa5ef0d69a6afbcac35c964181cf9454e31365da3b1ee24922d