Malicious PDF — malware analysis report

Static analysis result for SHA-256 69c1da9f9f7e085a…

MALICIOUS

PDF

91.0 KB Created: 2021-08-12 08:26:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: cd1938a9a6bc8754c319ebb9799adbf5 SHA-1: 1aaa86e1e3b84362de423ce855e8bc7dae103006 SHA-256: 69c1da9f9f7e085a16b8e0e4bccd22bb709a6722f847378aca738ac27b44a2dc
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript, a common technique for executing malicious code or redirecting users. The numerous links to compromised WordPress sites and disposable hosting suggest a link farm designed to distribute malware or facilitate phishing. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/1b427dc724b720185e239f11b7bda2ba/duraduzewuzifivagejubuj.pdf In PDF document text
    • http://kaizousha.com/js/upload/files/nokasasefiz.pdfIn PDF document text
    • http://www.gyndoktors.de/ckfinder/userfiles/files/34848674324.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160895b4a0e93a---51247920850.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a207754ea75---zetige.pdfIn PDF document text
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/a0626758189e410909c3bf30be6fe257/13678919037.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1608364df341b5---puvuxivafuwojuvejixiva.pdfIn PDF document text
    • https://acrgruppe.de/userfiles/file/40915549059.pdfIn PDF document text
    • http://broomfield82.com/clients/4/48/489ff1710263d1ca947d92387d56c809/File/mivediwikuvukowik.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/e7e12754233155b0ddcd17e07892f23b/zesisaxinunorosipinoga.pdfIn PDF document text
    • http://pizzeriadevita.it/userfiles/files/meromimatit.pdfIn PDF document text
    • http://mynigaoe.com/upload/file/20210525080112.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/ttd1vsc3f4l5n91lh5d770dg77/besurijifo.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/i8j6ls5vue1hndf81s7plrvdr1/40244310491.pdfIn PDF document text
    • http://royal-pizza.eu/files/file/doxariv.pdfIn PDF document text
    • http://avalon-essenzen.at/userfiles/file/piluded.pdfIn PDF document text
    • https://www.esfa.bg/root/ckfinder/userfiles/files/xorade.pdfIn PDF document text
    • http://alarmy-kamery24.pl/userfiles/file/70472462066.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a2620a0b7f---59998079674.pdfIn PDF document text
    • https://namhunglogistic.vn/site/files/63188976869.pdfIn PDF document text
    • http://leadershipcareer.kr/fckeditor/_upload/file/pevejalefasivo.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077acacc9202---wadilogimiwagutasuvi.pdfIn PDF document text
    • https://acryl-bg.com/userfiles/file/33894491686.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=casio+illuminator+telememo+30+instruction+manual+pdfPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB82 18036 bytes
SHA-256: 5ea26fa3351cf6a628e0ad5e65a32a545491c82dd4c77730d0b3d408e04ec0e9
font_01_sfnt_off000129c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129C9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000141e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141E0 11208 bytes
SHA-256: c1b061c8bdf5d0d0be87c5c4e0ba00cb325ec68ef85c2acbb1284c77e35eb8db