Malicious PDF — malware analysis report

Static analysis result for SHA-256 de2458b82f38f6f3…

MALICIOUS

PDF

74.1 KB Created: 2021-07-04 17:01:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d4b488feafb4dfaf1172abe293ae76e9 SHA-1: 7421c96e9d32585d201eb13996173d1a072d9035 SHA-256: de2458b82f38f6f38c5023ba0b524785cdbaf4cb151d666629e3aa8508328a59
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document is classified as malicious, exhibiting characteristics of a phishing and remote-support tool lure. It contains numerous links to compromised WordPress upload directories, suggesting an attempt to host malicious files or redirect users to malicious sites. The document's structure and heuristic firings strongly indicate it is designed to trick the user into installing or connecting with a remote-support tool, which is a high-risk activity in unsolicited documents. No scripts were extracted, but the overall pattern suggests the PDF exploits vulnerabilities or uses social engineering to achieve its malicious objective.

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
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://archism.ru/uplcv?utm_term=equine+tack+stores+near+me
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1608f1ec5f1aef---tejadobes.pdf
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160872099b2226---judufiwibomap.pdf
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160985d85e8ed2---ririsujerevezapetuxagope.pdf
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608a98ad00044---fekexulovebezodekosoribo.pdf
    • http://dlmberatung.ch/userfiles/files/22759613380.pdf
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/684612c231eb53126cece3231130bfcd/13879939372.pdf
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160afcc5e5f660---wapufozif.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160a17d9e485b3---kuxadinekof.pdf
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c90e5b74b3a---95939194158.pdf
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/16078b8cac988e---jesaxonoxitaxurijuguxene.pdf
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607992e9b9fd4---vajawowaxepavan.pdf
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7d7edb15a1---bapebuxemomepuwa.pdf
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/cg5dsijr4el0mrj6as3hkevhjh/59769399042.pdf
    • http://mvclassof1990.com/clients/8/8c/8ca0ba2c7a07c5cd1f21f9fc323c16c5/File/23104525535.pdf
    • http://amtutoring.com/clients/865321/File/36953625032.pdf
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160829f753ecc7---39405638805.pdf
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/580780c7a448c57ffc91a0c17fdaaf16/24542365066.pdf
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba1c0356ace---3857826311.pdf
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/127e7a888e1fd1ac6fef7a1713d7cc81/kixosanowuledit.pdf
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160700ec2aafd3---luboluwitekilo.pdf
    • https://alamansyria.com/userfiles/file/36924775540.pdf
    • http://www.urbanwaterways.info/files/potatedol.pdf
    • http://thementalhealthadvocates.org/files/userfiles/file/lonukuvozekelo.pdf
    • 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_off0000bda7.bin
350d39c3c2b598d48715afa43d7846408647f5ada90cefe14c1c9898eeeb387b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBDA7 10668 bytes
font_01_sfnt_off0000d626.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD626 16792 bytes
font_02_sfnt_off0000ee38.bin
e76fb14aa9e472c4bfbb82d19ada3bb0169b9dfbc82521bec36a65f098900dfd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE38 17372 bytes

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