Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbcd965a16899133…

MALICIOUS

PDF

86.3 KB Created: 2021-07-27 13:34:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: a397348f33dde47400b6746e6d57800a SHA-1: be03c7c84d732b557e56a82a5c02b521cbd793ad SHA-256: bbcd965a16899133d0fcef0d41f002f3199b96c231ec1177a77b4d2d62b5fbef
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document exhibits malicious behavior, as indicated by ClamAV detection and ML classification. It contains embedded JavaScript and multiple external URIs, some pointing to compromised WordPress upload storage and disposable hosting, suggesting a link farm for malware distribution. The heuristic 'SE_BROWSER_INSTALL_LURE' strongly suggests the document's intent is to trick the user into installing malicious browser extensions or updates.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://aliglobshop.com/userfiles/file/ganamefidonuxa.pdf In PDF document text
    • http://getem.plfiles/file/benaz.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/996b690fc761b2e660fde8588eb9942d/fezasuw.pdfIn PDF document text
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/c42dd5854d6988b617263348aa773926/29171742421.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607aede216a01---xasokezevosiwu.pdfIn PDF document text
    • http://lacasedescaraibes.fr/file/dadizimugulunuzaxexuna.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/72049089719.pdfIn PDF document text
    • https://thekolkatapackersmovers.com/ckfinder/userfiles/files/87366443842.pdfIn PDF document text
    • http://marcelponjee.nl/ponjeefiles/file/zeletedetonozizoluregag.pdfIn PDF document text
    • https://smobiil.eu/userfiles/files/3434325800.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16076e66b95b48---58237558614.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081c46c8cb39---17225655678.pdfIn PDF document text
    • http://backyardreleaf.ca/clients/6/6a/6a4eaaf8452764cb6fc14c9064ed0c71/File/fawisalupulozupaz.pdfIn PDF document text
    • https://ikansambel.com/contents//files/54799055746.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160aa0acad40ab---26594853079.pdfIn PDF document text
    • http://doremimarlikinsaat.com/userfiles/file/32105336122.pdfIn PDF document text
    • http://idolyokocho.com/js/ckfinder/userfiles/files/xawavasozaposekeraginat.pdfIn PDF document text
    • http://prunay-en-yvelines.fr/ckfinder/userfiles/files/pidanalalunorupudufagaw.pdfIn PDF document text
    • http://aostavet.it/userfiles/files/67206494745.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607666bad4b10---todelefaxota.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16088b456d86a4---zumaduvasebekiwixap.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/i7b9ri0c0mbkrgk38mm3l0fmu7/71433251001.pdfIn PDF document text
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/beccd96cf8f8ddedae42a06e2734679f/tigijitoxamuwubikanezuzis.pdfIn PDF document text
    • http://kirilmazbardak.com/userfiles/file/fokasulosezaxu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+download+roblox+on+a+school+chromebook+2020PDF 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_off0000ec9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9E 11196 bytes
SHA-256: 40588566ff72b392c6aafff1de536b5407c9518e28c1b1a6258abfa4d260f4d9
font_01_sfnt_off000106c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ed4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ED4 17020 bytes
SHA-256: 789ad9fccaa8183765c80a34ebdf5587c8b54c23a6bb39e4e23257492ba61dc9