Malicious PDF — malware analysis report

Static analysis result for SHA-256 b68d2fc5ef77c1ca…

MALICIOUS

PDF

491.0 KB Created: 2021-07-04 22:57:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: be048774830e5b3b677ff0bee268e94f SHA-1: 6192a3b95319997270ed3d8e4e9bf724bd60abcb SHA-256: b68d2fc5ef77c1ca3b643667c910a23cc6e67944c2a1b380d7519f705fa0e4b0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of a link farm pointing to compromised WordPress upload directories suggests an attempt to host or distribute malicious content. While no scripts were explicitly extracted, the PDF structure and link farm indicate a phishing or malware distribution vector, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9564

Heuristics 5

  • 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.
  • 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 http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16097622b392bc---mavekinikikoneduf.pdf In PDF document text
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/b0a4c12fc7035f124096d701e7f1f052/pazudixanojega.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3652bda76a---73750834323.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e1bec53d24b---jorikawibitizugilere.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cf506d3558---luliwujoralinibolu.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/b3dd2a53754829bacca5e47aebec8809/kekaxal.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cf552a50dd---bogukejasunupetirut.pdfIn PDF document text
    • http://geoodwierty.pl/files/file/dasesobivulipe.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1606da2c26ba89---rurogitexadirimululaju.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a56f53420f1---lanufokodemaminorofit.pdfIn PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/e9c7500eae87af08ca5b2cc31d4aef71/45094491159.pdfIn PDF document text
    • http://chineseclothingonline.net/File/84349846941.pdfIn PDF document text
    • https://masini-de-ambalat.ro/images/userfiles/78961642437.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ba74d61f6---duwiviwibifodene.pdfIn PDF document text
    • https://lolakarimova.uz/ckfinder/userfiles/files/73683827402.pdfIn PDF document text
    • http://dashoernerboot.de/userfiles/73631286828.pdfIn PDF document text
    • http://www.morrisjones.co.uk/EditorImages/file/91873288354.pdfIn PDF document text
    • http://ventilyatsia-v-sochi.ru/ckfinder/userfiles/files/81115188571.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/620f1870d8fb5f366ac60389bc43738d/debuvefapivu.pdfIn PDF document text
    • https://luminex.pl/upload/file/51825318627.pdfIn PDF document text
    • http://euredit-editions.com/userfiles/file/71777822950.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/69b274828c83b31d9a362a0b89d6ed7e/mekavawilipogujujasato.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160c05bcc92c44---pasujanekusatu.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/fumajivadidepejigijo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=distance+education+and+innovationPDF 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_off00073a8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73A8C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0007529e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7529E 18524 bytes
SHA-256: bfb714d7a7cf5fb9e20619033d2c75c09b93321b616dbc5bca446222f56147db
font_02_sfnt_off00078434.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78434 10384 bytes
SHA-256: 48187ffc2dc01eba50170188a3d378cf12d325daa9b04c50b8d0a4449064f82e

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