Malicious PDF — malware analysis report

Static analysis result for SHA-256 296fb7247a41041f…

MALICIOUS

PDF

82.6 KB Created: 2021-09-21 01:26:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5fdb5fd446cf5c239642eece38538a22 SHA-1: f592006ea3eed77663a05dd898a61a6ea458dd68 SHA-256: 296fb7247a41041ffb7fa1a78a580dd27b38ac82547edab14e3d486cec0c6ee9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://pistant.ru/uplcv?utm_term=ninja+creed+game PDF link annotation
    • https://sushixusa.com/userfiles/files/81471942037.pdfIn PDF document text
    • https://resepangka.org/contents/files/gaxigipefuzaduneketisadax.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16147daf449ca9---81501888372.pdfIn PDF document text
    • http://bluecars.pl/userfiles/file/dikas.pdfIn PDF document text
    • http://studiomalpocher.it/userfiles/files/visiboz.pdfIn PDF document text
    • http://secoinblock.com/upload/files/rixazufanujofujipivus.pdfIn PDF document text
    • https://legend-chang.com/UserFiles/files/49820865191.pdfIn PDF document text
    • http://koovappadyscb.com/ckfinder/userfiles/files/24616661735.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1614688dc0fa3c---koludadudafuzezuzitubonu.pdfIn PDF document text
    • https://morabia.fi/images/file/47269199549.pdfIn PDF document text
    • http://hongshengfish.com/uploadfiles/20210917/210917204316094438lh8nyot91osg.pdfIn PDF document text
    • https://toocapen.com/files/45086448452.pdfIn PDF document text
    • http://gaushalango.com/uploaded_files/userfiles/files/bijatavuzifenab.pdfIn PDF document text
    • http://belstroyiz.ru/img/file/vojuzizijezejuvilenike.pdfIn PDF document text
    • http://1137.jp/app/webroot/js/ckfinder/userfiles/files/17937582733.pdfIn PDF document text
    • http://romengo.com/ckfinder/userfiles/files/41690428298.pdfIn PDF document text
    • https://swiz.eu/files/editor/semazopiwodilajix.pdfIn PDF document text
    • https://asharfilalkulfi.com/ckfinder/userfiles/files/jikimuw.pdfIn PDF document text
    • http://kino-cosmik.ru/sadm_files/rerosipasuvewemis.pdfIn PDF document text
    • http://quaint-house.com/images/blog/file/73006721901.pdfIn PDF document text
    • http://leaders-adv.net/userfiles/file/gobegud.pdfIn PDF document text
    • http://celesteandtorsten.wedding/images/file/86682484492.pdfIn PDF document text
    • http://edilcfcostruzioni.com/userfiles/files/43651402067.pdfIn PDF document text
    • https://learn-atdi.com/uploads/files/41583817723.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/16141f06bef92d---59182497269.pdfIn PDF document text
    • https://umartravel.com/files/jesinopejurupesurepavajim.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_off0000de9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE9C 10388 bytes
SHA-256: 19f11d59d86e063929fa588ce7cfb4928380bbd3429e9b852deb79a8211dda2f
font_01_sfnt_off0000f5c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C2 18076 bytes
SHA-256: fbc3a07ed20e731c86c7656a1e6f7939d234f0b5c5c7fcea62dd36fd0bf0f667
font_02_sfnt_off0001248c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1248C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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