Malicious PDF — malware analysis report

Static analysis result for SHA-256 b92f6cd8fb688413…

MALICIOUS

PDF

208.4 KB Created: 2021-08-03 21:53:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 50d2f945651237a46993c82850c0ce08 SHA-1: 6cf446a514b01883da73a2265c56f339bcb29f1a SHA-256: b92f6cd8fb6884133e6e87476ce5d69fd1539685f9744747c142befe9945b233
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content. The ClamAV detection and ML classifier further support its malicious nature. The presence of external URIs and a 'download button' heuristic indicates a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7976

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/c97b5f2a2d7f0953b003b33147fa48de/lukojumujesotoj.pdf In PDF document text
    • https://extremedriveline.com/ckfinder/userfiles/files/48062478929.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/dtbm10mcb98j81fd9lt2vdke17/77939304776.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/641b868a0dfbb1ccc16acf34ebd5b5d0/xotixapavuterudosabag.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2c3871a74c---96497312087.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/d1p29ff2vem4215hd1n9tlcbej/pikepunot.pdfIn PDF document text
    • http://carszana.com/image/upload/File/75453324192.pdfIn PDF document text
    • http://wildpflanzen-planung.de/file/97046422800.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e4dd45d22a---42972180471.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608181fadd6a6---viwemumurotovokavor.pdfIn PDF document text
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/32d67f13efbb550305b26a9f4fbc4ce4/84526232575.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160791aa63e91e---65311084545.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086f5af6f941---votigikidakowuka.pdfIn PDF document text
    • https://gbagencement.fr/uploads/file/zixevalum.pdfIn PDF document text
    • http://kirakuramenandsushi.com/uploads/files/wasijemejomifanuvogubej.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160964c5e1c440---77570474625.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/vf17terjmqph3pojjh3bubid47/jigulewumaxutaveresi.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/1fc8aaaf3a39ba6f989daa4395bdaf81/vutilodijuruzijo.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/87830781303.pdfIn PDF document text
    • https://badrivishal.com/media/repiwagilafezemopa.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608b260d1d53e---3264997035.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/3fb7accedcaf4c1c1493bf91f77d4415/47480070596.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/f4d6vjfquqkhoi7ld8vikb8eo6/folubaxopusix.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=lego+jurassic+world+all+dinosaurs+cheat+codesPDF link annotation
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002b005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B005 2284 bytes
SHA-256: 0613a5eaf1642e53e59f62021608115b9710ebac54cd8c1d5dd913da62985816
font_01_sfnt_off0002ba41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BA41 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0002d258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D258 10920 bytes
SHA-256: 2819ba47887aafdd0a11371111856efb0c80d42cc17a01973f07243de56b21c8
font_03_sfnt_off0002eb5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EB5D 28408 bytes
SHA-256: 926937292b24f21b69614634bfc03ca4f6b5a7fb4ca15aaf97c3451120cc7c75

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