Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ec6478642155fe6…

MALICIOUS

PDF

72.3 KB Created: 2021-09-03 17:17:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 676e5622861c39d768a8e9c7b16975d7 SHA-1: f9c6f097ee25e8937bc9df7d5ebc3675b481390b SHA-256: 1ec6478642155fe6836f5fe7e557bd56810d506f17a0f6dc8f6794df4621cc0d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The file functions as a link farm, with numerous embedded URLs pointing to compromised CMS uploads and disposable hosting. These links are likely intended to lead users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://growourworld.com/clients/83159/File/30184417440.pdf In PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/nhefcvglb1453p8dm0lp1279f8/ginifaluronelikuzogu.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/a491b353feb10af24c3ba50f95892112/fovuvivutetijiz.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/f431bbaebe38ebe9eb24cd6c7ce97263/kakobopomexomeka.pdfIn PDF document text
    • http://longhornrings.com/clients/0/08/08da48574b41509ac7bedcf2500dc652/File/fajurapugi.pdfIn PDF document text
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076cf0cbfb23---86082944130.pdfIn PDF document text
    • http://mdsalon.ru/img/lib/file/dabojoxapakigolarubexiro.pdfIn PDF document text
    • https://codecs.roimages/file/87996201080.pdfIn PDF document text
    • http://greenmodels.ru/uploads/files/gesisexanawabupavopula.pdfIn PDF document text
    • https://aldapa.eus/files/galeria/files/41220261249.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d666372a28---80033216724.pdfIn PDF document text
    • https://xn--80aaa1arbfjoe3bzh.xn--p1ai/data/files/takilalowalasib.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/38eb6ad625ca9f506f746e4ae9824332/51898673335.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608aab066acbb---lupim.pdfIn PDF document text
    • http://nt-module.ru/ckfinder/userfiles/files/befozozaxivu.pdfIn PDF document text
    • https://yssnewlessons.org/UserFilesTwo/file/bexekegaratupiferufedagu.pdfIn PDF document text
    • http://gpszone.hu/upload/userfiles/file/94361868141.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607b7340c647d---guxaw.pdfIn PDF document text
    • https://feldmann-spedition.de/pics/userfiles/file/puvewinorudaxegat.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/stvjepb8rk5b3o9g65hl3l6oi7/60862326981.pdfIn PDF document text
    • http://lisaarkin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/55699681243.pdfIn PDF document text
    • http://unewstoday.com/task/userimages/file/durumenosapozogiwodumedo.pdfIn PDF document text
    • http://kuppersbusch.hu/userfiles/files/29579366973.pdfIn PDF document text
    • https://tedvandergulik.nl/userimages/file/71156538989.pdfIn PDF document text
    • https://fablab808.com/nbloom/fckuploads/file/gimemugavipurofazobafewex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=children%27s+cognitive+development+and+learning+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_off0000bb99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB99 14896 bytes
SHA-256: 6f5266135e5881b1a0a42da108e9b95f5605c074252592ea3a7a4b284456dc27
font_01_sfnt_off0000e105.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE105 11196 bytes
SHA-256: 7e5993a3c17af9d8b84eddcc560df1db6793db686af8a013abd7b4122067f9ab
font_02_sfnt_off0000fae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1