Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e84601b3db4542d…

MALICIOUS

PDF

79.1 KB Created: 2021-09-08 01:51:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 860b4a6fc287353b38c8481753989b65 SHA-1: 90ddb9b967141108f7a98de1748cd5b0a20e7e6a SHA-256: 0e84601b3db4542d7f1e089d168909ee54a8bc9424a22dd355e6e6b8479229e5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript, which is often used to redirect users to malicious websites or download further payloads. The heuristics indicate a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to distribute phishing content or malware. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/1dcaa26eccfde9f156409511c7b3f745/46968722542.pdf
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/d74e5e4e7c7fbf64e64830178442edd5/49015660478.pdf
    • http://angerdress.store/ckfinder/userfiles/files/vefudizebofasogene.pdf
    • http://dc-42351dc5a6b3.prshots.es/uploads/userfiles/1630253833/files/dodiferaboziziwapodo.pdf
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609a646f38727---runako.pdf
    • http://aksaaydinlatma.com/img/editor/image/file/12920458412.pdf
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16085239066e2d---18012192664.pdf
    • http://architettoannalisatinelli.it/userfiles/files/nadafasajew.pdf
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/07497a06b542bcd446b128b8eecd2641/13414317671.pdf
    • http://gapoom.com/upload/fckeditor/file/8608277555.pdf
    • http://backkwang.com/userData/board/file/dinaxivipebamurudul.pdf
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/16137e6dedda28---zujukamig.pdf
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/16075743d63e6d---kigatopi.pdf
    • http://maduraicaterers.com/app/webroot/js/ckfinder/userfiles/files/55313601757.pdf
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6931342c92---davezabamesavexudalukine.pdf
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160a9dc131799e---36611482883.pdf
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612dbd49e735e---donupasenotizire.pdf
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/6b70d547577189fb9e386bdeed477ec6/wipugabu.pdf
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609212d374a70---kuzadavopefupowigejugexu.pdf
    • https://ivanamihic.com//files/16094770575.pdf
    • http://reylab.com/userfiles/file/telituxaxiza.pdf
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/21fd06e46b40b71e73d33ccececc7ce1/gumelakezisisu.pdf
    • http://ned.ru/uploads/files/jutezatede.pdf
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609cd3263d6b4---31774896420.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=nissan+skyline+r32+gts+t+service+manual
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbdf.bin
9b3a48b92b1c1fbd89d7f983763bad17c540edcc81021a6a7857f426be22362b
pdf-font-stream PDF embedded font (sfnt) at offset 0xCBDF 18564 bytes
font_01_sfnt_off0000fc9e.bin
d205a3888047139de3e2d808173a6a7d54bd99fd1d24d0bafb65aa9780b1835f
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC9E 11096 bytes
font_02_sfnt_off000116a5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x116A5 16792 bytes