Malicious PDF — malware analysis report

Static analysis result for SHA-256 069ccb2a01f971a7…

MALICIOUS

PDF

92.8 KB Created: 2021-07-29 22:53:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 7f778c79f7649fc3a94bfc50ea8c8b52 SHA-1: 72b65c13497ec6978a0dd1cc42f441dbc4ffed70 SHA-256: 069ccb2a01f971a7c6ee48039474bfd035558401906dd97434bce4884cfc44c6
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF contains embedded JavaScript and is flagged by ML classifiers and ClamAV as malicious. Heuristics indicate it uses a link farm on compromised CMS uploads and disposable hosting, and specifically employs a browser extension/update installation lure. This suggests the document is designed to trick users into downloading and executing malicious content, likely via the embedded JavaScript.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://stigstudiotecnico.it/userfiles/files/1790290695.pdf In PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160927a8cb02e5---rekexuvorewovoxiwomisig.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a77eeaa09a7---39082216346.pdfIn PDF document text
    • http://hiace-yoshikawa.com/js/upload/files/pejodi.pdfIn PDF document text
    • http://taeguektour.com/FileData/ckfinder/files/20210705_B988D2F3ADE84A70.pdfIn PDF document text
    • http://daieimotors.com/js/upload/files/62462371740.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1f6ccbec3d---milesabogedolidivos.pdfIn PDF document text
    • http://smcertificationservices.com/userfiles/files/97155215545.pdfIn PDF document text
    • http://r2doodles.com/clients/4/4a/4a4ed909dcef54c1e3ec6a0ce1d29f2d/File/13553859239.pdfIn PDF document text
    • http://liyangah.com/Upload/file/sekazuvujoramuvimebuvu.pdfIn PDF document text
    • http://angelescare.com/userfiles/file/68218781302.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/6tvl02nkc1i6h2uh4o41rddc17/59933970887.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/41d49d816aa4fd132a8727671b1b63c9/63748392370.pdfIn PDF document text
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/889508ce9f3350679f9f5e0ef226fd93/panok.pdfIn PDF document text
    • https://autotrans911.com/thread/admin/uploads/file/vutijewufogirejo.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/eb28bf7218b19ed1106e37c3a01eab78/delelovukuvewera.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///59927065905.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160babacfb73d1---nibobotikeran.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078e09741c2e---22060316123.pdfIn PDF document text
    • http://www.cenlafilm.com/siteuploads/editorimg/file/fetepatibipuf.pdfIn PDF document text
    • http://learningkey.org/userfiles/99892313114.pdfIn PDF document text
    • http://www.minaakshimajumdar.com/fckimages/file/28332939244.pdfIn PDF document text
    • http://plncse.hu/php_data/file/pivejilitalowu.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098a4d43bb11---zutavokatepiwivamepesoxal.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077408a8a0d3---92295548384.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/67901184913.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=how+to+get+free+cash+app+money+2021PDF 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_off0001047c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1047C 17224 bytes
SHA-256: 5fef6f687ba7b1aaca7654d71ffc87a95468d5ef53ef9935fe0380b315b7b4ba
font_01_sfnt_off00013172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13172 11272 bytes
SHA-256: 9b6acea789ea6a3e99b8f3aebe09ca22db152cc507849779c99aa63a8665d1b3
font_02_sfnt_off00014bed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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