Malicious PDF — malware analysis report

Static analysis result for SHA-256 d11705c2d23127fb…

MALICIOUS

PDF

217.2 KB Created: 2021-06-28 10:03:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e5bed16a9917616bc6009a2f2f57831a SHA-1: 131352fcae2608794ef85f133473e5f650c3f337 SHA-256: d11705c2d23127fb559e06497c229bdcebffc14f931c30fee88474e20f6e9bcd
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm pointing to compromised WordPress upload storage, indicating an attempt to host malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. Although no scripts were directly extracted, the PDF structure and compromised hosting suggest it's designed to trick users into downloading further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9721

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dbc94c2a8a---67246936405.pdf
    • http://kpdb.org/userfiles/files/sudem.pdf
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083b461b9172---76210889847.pdf
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078b4a999afe---wiwisavujelux.pdf
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/32d11fb1ee51d680b5757b85053ac395/93091149208.pdf
    • http://nowyhotelik.pl/userfiles/file/kisivifowokularavinate.pdf
    • https://avigailpekelman.com/sites/default/files/file/vupezaduloxewite.pdf
    • http://thaiboxes.com/piceditor/file/palakowubo.pdf
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078e6b7ca24a---funedojutezusenadiluzil.pdf
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/905890c2d6243283fad2c1fe0da63b48/defupudolur.pdf
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/6965cdd0eb8b1b3cf3c7c2b3d3e0cf60/29496347071.pdf
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608776a79f776---noledeniladazajapol.pdf
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/fc272b65ak1q4jupj0ddhlvu08/47280737395.pdf
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/54688848824.pdf
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acc34e3d05b---laroduxusewitisi.pdf
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/1afac66e2a7344ee1fc505829dd9f0de/22041207136.pdf
    • http://instandee.com/Images_upload/files/patope.pdf
    • http://animationcoach.com/userfiles/file/wutozejixonawi.pdf
    • http://vzwsportenmuziek.com/content_docs/pumasujugijumokupikedazo.pdf
    • https://monuments-msk.ru/wp-content/plugins/super-forms/uploads/php/files/853717873ae48d7535871458a9951916/nimedatuporowipubunurorof.pdf
    • https://baobihungphu.com/media/ftp/file/fekakalekaxe.pdf
    • http://remont-etalon.ru/upload/files/jodupipanagopewugesan.pdf
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16083163d4eed4---jikitasowasigef.pdf
    • http://woodwork.pl/ubezpiecz/obrazy/file/wolatirututiluvifiratemi.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=comfortably+numb+solo+tab+acoustic
    • 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_off0002f7d0.bin
208a7d009c617b14702662e5e2ce666e58861ed26ec463ad316edb19a5020907
pdf-font-stream PDF embedded font (sfnt) at offset 0x2F7D0 10748 bytes
font_01_sfnt_off0003108f.bin
a38528000497792f0cce75fd132a8003ca48f22cdd431fcb8f84a69a11fb3796
pdf-font-stream PDF embedded font (sfnt) at offset 0x3108F 18024 bytes
font_02_sfnt_off00033ef1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x33EF1 16792 bytes