Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ee2dea330d8d059…

MALICIOUS

PDF

69.2 KB Created: 2021-09-24 23:29:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6936236c6cb92feaa6826a9f3f064761 SHA-1: cba0945b979ff8ce84482af0999858a51f4f85be SHA-256: 2ee2dea330d8d059d365c1913402e2e501759f35c77b7e9d38ba672db72b8d09
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as a phishing trojan. It contains numerous links pointing to compromised websites and disposable hosting, suggesting it's designed to redirect users to malicious content. The presence of external URIs and link farm characteristics indicates an attempt to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://crewmak.ru/uplcv?utm_term=recover+photos+from+recycle+bin+android PDF link annotation
    • https://www.nvsrolko.org/ckfinder/userfiles/files/vofixazasexutukidazuloni.pdfIn PDF document text
    • http://logisticsnetworks.net/ckfinder/userfiles/files/xunibodixani.pdfIn PDF document text
    • https://md-bud.pl/szklo/photos/file/tufaxetugosukavi.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/2a6699ec4cc6d7b21bc8b74f2074f62f/kezuduz.pdfIn PDF document text
    • http://ranaghatpchsschool.org/userfiles/file/42256139233.pdfIn PDF document text
    • http://shopphutungmayphat.com/upload/img/files/xesumasajizafigadufudem.pdfIn PDF document text
    • http://halongbaycruises.org/upload/files/vuzududa.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/d227c0e6697bd8d2b0df687957fa7787/18236219192.pdfIn PDF document text
    • http://hotelniagararimini.eu/userfiles/files/10694450658.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142edaeb16f7---99654379267.pdfIn PDF document text
    • https://alohasafaris.com/files/rumowatubuvuwo.pdfIn PDF document text
    • https://www.comperat-89.fr/ckfinder/userfiles/files/pokusa.pdfIn PDF document text
    • https://nhatngudongkinh.phapluatvietnam.com/upload/ckupload/files/39731983062.pdfIn PDF document text
    • https://mantyobras.com/userfiles/file/nebulomibalemamoxukomeve.pdfIn PDF document text
    • https://andrejc.si/files/file/teweziborubox.pdfIn PDF document text
    • http://austral-immo.com/userfiles/files/laluperovibofiso.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1612fd95e597af---85143939996.pdfIn PDF document text
    • http://worldsocialistpartyindia.org/ckfinder/userfiles/files/newokexalumogomi.pdfIn PDF document text
    • http://www.europesolidaire.eu/userfiles/files/43804058.pdfIn PDF document text
    • http://tsraccountants.nl/mailing/images/photo/file/kejesubagezi.pdfIn PDF document text
    • https://paeonia.ch/userfiles/files/6223500539.pdfIn PDF document text
    • 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_off0000ad00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD00 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c517.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC517 11248 bytes
SHA-256: 9556444b260283dbb3376974949cb233563ee408afd0d080a7416a5c7fb0f291
font_02_sfnt_off0000df16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF16 16016 bytes
SHA-256: 01749f523ad8699c6d1598d764b71cd9250c6d603e130f40f34daa26028eb8b9