Malicious PDF — malware analysis report

Static analysis result for SHA-256 3592f3275aead9f0…

MALICIOUS

PDF

94.0 KB Created: 2021-06-27 17:55:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d930a307bd24237b6c066583ab522ca3 SHA-1: 00574b995b7eb76846627743d34ee7f99a6e97c1 SHA-256: 3592f3275aead9f051edf10b25af633b0f3d3dd80f708364aed3179be689039d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm with numerous URLs pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious or phishing content. The presence of multiple external URIs and the nature of the hosting indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2268c4b92---11494117032.pdf
    • http://clarksville.net/wysiwygfiles/file/koguxexoror.pdf
    • http://antonioruizabogados.es/userfiles/file/nisigaluxuzilorusibuduxo.pdf
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/38b724e469a94eeb3c9f5c251df09feb/nimuti.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/99c8f94efbbc39188edc5f4c0bd2788a/repakodom.pdf
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d19f2d9ca8d---jiwosow.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a8c03bced3b58a65c9a850795dde62aa/75250576063.pdf
    • http://specimport.by/files/files/12745234888.pdf
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16081ef86c407f---fezamenedilunenepu.pdf
    • https://tort-art.ru/userfiles/file/93299352804.pdf
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/b1324d064ebb58bfa5a3ebec464dcba3/11771419744.pdf
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/26uhecrveigk9nhrcc5khc56r9/fexuk.pdf
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4f48704da1---kepot.pdf
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/cf7bf403799b20d4155febf6756af12e/66284074270.pdf
    • http://unicaconsultoriarh.com/images/files/vudifaxenuzojuvolabam.pdf
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/gvgjq83rvnc05gneqtdd1si0he/mozezogugijumerawojukeb.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16078a31ea956c---gajuvimatapel.pdf
    • http://psychologkmalinowska.pl/ckfinder/userfiles/files/pefalibokemuza.pdf
    • https://amitadevnani.com/userfiles/file/dipavimefizazogisudawir.pdf
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a06c2c495a6---muneboniselijunaleri.pdf
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/8f6cb563c6a998f16a67b52003aaa0c8/filigebejekogevunal.pdf
    • http://tradeweb.es/userfiles/file/38582801672.pdf
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/5dea35e5d80c2b3da347e46d0f262061/kunubozijabubozomaberor.pdf
    • http://beloezoloto.ru/userfiles/file/87843141353.pdf
    • http://rittenhousereunion.com/clients/a/ad/ad7d26974070b67854a29702aed78614/File/jibasode.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=lick+and+riff+guitar
    • 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_off00010c58.bin
47f1de0ca8e466e347e0d12a797069ee9c7d2c72937e72b8b3fd7af95ed5a8f1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C58 17600 bytes
font_01_sfnt_off00013a03.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13A03 16792 bytes
font_02_sfnt_off0001521a.bin
53d03e2bae5c8f3fd97066a888074c1af6add88d399dfd1c6c220a3b51a838e4
pdf-font-stream PDF embedded font (sfnt) at offset 0x1521A 10336 bytes