Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d9e9da75337abb4…

MALICIOUS

PDF

71.5 KB Created: 2021-09-06 16:34:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: af778302b8b3919b4c3bd5aaf53d1469 SHA-1: 80e44d42c940eddf907a12513da8a50b039d9e7d SHA-256: 0d9e9da75337abb48d2b7d5c479857a96981c87b44463c18d5f487efdff3de3f
164 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains embedded JavaScript, indicating an attempt to execute malicious code. The document also functions as a link farm, directing users to multiple external URLs, some of which are hosted on compromised WordPress sites, suggesting a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://jhservice.net/imagenes/galeria/files/jemofumeruribik.pdf In PDF document text
    • https://jdlpartnerss.com/userfiles/file/32096444125.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/1eilpsngtn37brtp73suuv9340/17434174850.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16123cc61b8bed---sozevep.pdfIn PDF document text
    • http://tylerdaynursery.org/clients/8/8e/8ed7c4ff1d995b028c1180c1bccb3f4a/File/wadawitikax.pdfIn PDF document text
    • http://nawaress.com/webroot/js/ckfinder/userfiles/files/41804439590.pdfIn PDF document text
    • http://natproperty.com/userfiles/files/jikirulederujibebebupe.pdfIn PDF document text
    • https://jokerprod.net/userfiles/file/woxugefexuvufe.pdfIn PDF document text
    • http://eaas-journal.org/survey/userfiles/files/genokexezaw.pdfIn PDF document text
    • http://www.morrisjones.co.uk/EditorImages/file/90619249400.pdfIn PDF document text
    • http://generaltubi.com/container/ckfiles/files/doserabezijazolagofifuliv.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a7ac5971c---wures.pdfIn PDF document text
    • http://www.badischer-kunstverein.de/ckfinder/userfiles/files/78636931556.pdfIn PDF document text
    • https://ideylia.fr/uploads/file/45239568384.pdfIn PDF document text
    • https://andymullinscommercial.com/home/andy/public_html/ckfinder/userfiles/files/tojijokasiju.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f68294a8b0c---mogewizawilodaxiwupafe.pdfIn PDF document text
    • http://guowangcable.com/d/files/gipenijetovofozaj.pdfIn PDF document text
    • http://residenzaeden-albisola.com/userfiles/files/dixiw.pdfIn PDF document text
    • https://mysilo.com/upload/ckfinder/files/75308573127.pdfIn PDF document text
    • http://nerezove-kuchyne.cz/UserFiles/File/xodadafatefa.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606cddbe1761f---futawo.pdfIn PDF document text
    • http://wirheiraten.de/images/file/nedodujugomawifodef.pdfIn PDF document text
    • http://cathyourhair.nl/js/ckfinder/userfiles/files/39786611821.pdfIn PDF document text
    • https://equator-maritime.com/userfiles/file/2269147881.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=improving+english+communication+skills+pdfPDF 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_off0000b3ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3AE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cbc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBC5 11276 bytes
SHA-256: 5eb56e73012c8a1420a6e4b877733f419fa72f39d1211ed160395703aa3c887d
font_02_sfnt_off0000e5d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D5 16504 bytes
SHA-256: 3948fd71376b9235e6af3af822b0a06f82478f631ad2fc6e22e997411f8ad17b

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