Malicious PDF — malware analysis report

Static analysis result for SHA-256 0026bb0612cad225…

MALICIOUS

PDF

102.1 KB Created: 2021-07-13 00:18:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0f1b5f922ca613fc7728272f70d186ab SHA-1: 565bf647c7e4e338d50746936d459b57a6041bb2 SHA-256: 0026bb0612cad225f9238b1504c7753ad91b3841c3eea31f5f568a86b70dee94
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ClamAV as a phishing trojan and ML classifiers indicated maliciousness. It contains a link farm pointing to numerous domains, including compromised WordPress uploads and disposable hosting, suggesting an attempt to redirect users to malicious or phishing content. The document body was unreadable, but the heuristics and URLs strongly indicate a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9790

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://crysiq.ru/uplcv?utm_term=if+you+like+this+book+you+will+like PDF link annotation
    • http://bobas24.pl/Upload/file/wadugotulipoz.pdfIn PDF document text
    • https://consjurist.ru/uploads/files/67927097325.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e39495335a4---25126293838.pdfIn PDF document text
    • http://rowanfamilyreunion.com/clients/28915/File/fokipomotetonubufutuvu.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/e6a628f6d84d41be309075a81e4bf9cf/fekibebi.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/jljn451v3aqpatmp6lmoe5d4k6/71788230006.pdfIn PDF document text
    • http://kaupa.cz/userfiles/file/zolonujuwibibo.pdfIn PDF document text
    • http://batiment-tunisie.com/userfiles/file/jipijulepafamimeweberew.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/vukufapevajefaver.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/11dg1j28qnuf53lcefofg3ig3s/73184420174.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e6f852ee82e---jozirupagazebajiloxakuboj.pdfIn PDF document text
    • http://anthonyellisonfamilyreunion.com/clients/f/ff/ff850d76676c1858bf5e443b7a907d3b/File/72007154741.pdfIn PDF document text
    • http://www.patriarca-batiment.com/ressource/site-image/files/36890228602.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1606d333382e18---99416564470.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/rarowusigewewupolunodaki.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b22e7d3985d---juribomomawaririlemu.pdfIn PDF document text
    • https://espaciocultivarte.com/ckfinder/userfiles/files/61374965784.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/499730d4f1ed9102ec08d3b0f5c01b17/72947524407.pdfIn PDF document text
    • https://memoservicesrl.it/file/mutomevevebezaxugupa.pdfIn PDF document text
    • http://alfavit.tv/userfiles/file/43098961342.pdfIn PDF document text
    • http://thegreenlegacykeepers.com/clients/e/e8/e8dc17949b7ef813e9937e453902477f/File/33080249389.pdfIn PDF document text
    • https://lordpin.com/calisma2/files/uploads/93274223461.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/14e69a1eb048cb8572334c1b3e7f313a/dosafuximonemo.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/16096f5381d7d6---jadivanusuvemajegoparul.pdfIn PDF document text
    • http://ekotronic.eu/files/file/fifutimi.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/20316669528.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_off00012b53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B53 18352 bytes
SHA-256: 3c62cde8aa16c879537264a1ff9f1ccae28fc61305c3ddc7b0ce28bc5121fc42
font_01_sfnt_off00015b20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B20 10428 bytes
SHA-256: da11dd4008069dc1a9a5e242c543d589d2982f9617026f9f7a8e834d2c03c933
font_02_sfnt_off000172fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x172FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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