Malicious PDF — malware analysis report

Static analysis result for SHA-256 036e7b4050d8fbf8…

MALICIOUS

PDF

86.0 KB Created: 2021-08-18 13:13:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a9947648ca62b3b5795249de2a6eb181 SHA-1: 12a783b1f697b780308d909f5ad37cc6a19badf4 SHA-256: 036e7b4050d8fbf857f990506d4ba603c232f5419818c9f4e19cefb22ba54eff
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains a link farm with numerous URLs pointing to potentially compromised CMS uploads, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the nature of the links and the phishing detection indicate a malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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.
  • 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 http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160727ef56631e---70576322918.pdf In PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/e60a6a61201fe92c8c73d9269477e8a2/7784418958.pdfIn PDF document text
    • https://bamor.org/userfiles/file/24005348359.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/65dced2c246dcb6f0ccddc1e7ee0d565/fubisepilixikujexizebi.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/73510743767.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/53c958969b9147b5f6276b112829a77e/wututaf.pdfIn PDF document text
    • https://www.micd.edu.np/ckfinder/userfiles/files/12109431659.pdfIn PDF document text
    • http://limoride.net/gallery/file/lerubaxudumodebufotoreta.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/8516a850ae4003f810a1ba3c797fec2a/68991920954.pdfIn PDF document text
    • https://taevlingar.se/images/pages/file/muleg.pdfIn PDF document text
    • http://daoltrading.com/userData/board/file/gafozogoz.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/nosulugesogirubiwe.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/dhqrd4j3q05472c2fk5v261rhl/8549561651.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ff5835cee18---3807837513.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/q1pdcsf61u9n1lok4bajn1qebl/tumigu.pdfIn PDF document text
    • https://villatoscana-pi.it/userfiles/file/lanejopudusol.pdfIn PDF document text
    • https://agmatbaa.com/upload/files/lexafosonamunazizopeb.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bf4df4d46c8---97630552157.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/lanrgsl18d0u3cvba31o754afe/varasavoweretunozu.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/demij.pdfIn PDF document text
    • http://vietxetai.com/wp-content/plugins/super-forms/uploads/php/files/u9so17jlkp57d56lcp3ogp5vdh/46186227863.pdfIn PDF document text
    • http://ssaisarang.com/ckfinder/userfiles/files/27362775912.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/33ababe218bdd718a29084730b99db25/weluloxewesakosoru.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160949bb911f74---visepifuvijejijoj.pdfIn PDF document text
    • http://rgn2u.com/userfiles/files/suremujo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=do+they+have+uber+in+palm+springs+airportPDF 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_off0000e5b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B4 18032 bytes
SHA-256: cfc416e393502b20f2a15f5235894582dccd11eb1a53cb562521a3cc575f893b
font_01_sfnt_off00011545.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11545 11120 bytes
SHA-256: 644325c1811a2f3887dcf522d52c54e315939706b686295445a99205e02f604d
font_02_sfnt_off00012ed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ED6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1