Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c32a6da7b8d336c…

MALICIOUS

PDF

72.1 KB Created: 2021-09-04 00:56:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ac497cdc3012cb917a570f72f19c6225 SHA-1: 609188dd5267bb0f3c35a5edf90d8d38c2156108 SHA-256: 4c32a6da7b8d336c9eaa28a6c9c54ee3a12c8a7bbddd2c7b350df301e52d1a5f
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and a high ML score. It contains embedded JavaScript and a link farm pointing to compromised WordPress upload storage, suggesting it's designed to redirect users to malicious content or download further payloads. The presence of embedded JavaScript indicates an attempt to execute code within the user's browser or PDF reader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8257

Heuristics 6

  • 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
  • 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://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4d5ede092b---17260693914.pdf In PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b3a0af96c1d---33810101610.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160771d9797018---12170643646.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/0e88a04a95888d291a3f8ec9188b5253/36731516685.pdfIn PDF document text
    • http://gospelpour100voix.com/fichiers/newsletter/file/magiwode.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/16100c91f4a4ff---perere.pdfIn PDF document text
    • http://austria-ex.com/images/blog//file/vozadeviv.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16071c37826fce---tufovedogukumapawakoma.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/gcm2fmaq5dd1v2h9892uacb8q6/taxeborajumipugimobez.pdfIn PDF document text
    • https://bibliotheque.ville.deux-montagnes.qc.ca/ckfinder/userfiles/files/dadoxaxefej.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/090f174166375a4a0b66b5caadf74662/gogivebu.pdfIn PDF document text
    • http://fioredda.com/userfiles/files/30948811524.pdfIn PDF document text
    • http://www.s4b.nl/upload/files/gosejezewunopa.pdfIn PDF document text
    • http://bagliodeimille.it/userfiles/files/vupokoz.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093c9f1e3da4---46830170269.pdfIn PDF document text
    • http://zhodnoceni-penez.cz/is/images/FCKeditor/File/47090310361.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1608f0cd1e4f2a---72572077657.pdfIn PDF document text
    • http://cissi.it/userfiles/files/vakiputonowewu.pdfIn PDF document text
    • http://przychodnia-felinskiego.pl/uploads/editor/file/31795933941.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac41c36f2ea---57269818698.pdfIn PDF document text
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/16085bb4331b33---11673099923.pdfIn PDF document text
    • http://tao123.me/pro_pic/files/42756200996.pdfIn PDF document text
    • http://ikuma-car.com/js/upload/files/soper.pdfIn PDF document text
    • https://blagoustroystvo24.ru/ckfinder/userfiles/files/vakijubufofeto.pdfIn PDF document text
    • http://ahhsclassof1980reunion.com/clients/e/eb/eb0bda5e83c72ae03ef0bdd1ae4752ba/File/403436350.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=four+stages+of+culture+shock+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d81f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD81F 17132 bytes
SHA-256: 716e8074081c991c26d88fba766d188df311471715386701a6bf12f702d02888
font_01_sfnt_off00010474.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10474 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1