Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce95d8061cf6b43b…

MALICIOUS

PDF

85.5 KB Created: 2021-07-13 07:25:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d596c69f2734c0cc3924c491065e2627 SHA-1: 7b749bb79f92d847ce932c2008f955963b65e948 SHA-256: ce95d8061cf6b43bb9d9efdc356c73d9937bdcb6693321330a61d8d01d2f4839
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress upload directories, indicating an attempt to host and distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and URL patterns are consistent with a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

Heuristics 6

  • 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.
  • 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 https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/d3cc36d19cbe9d264c9ae6d9475f241d/bebozufokunonegukodufi.pdf
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160935b7c86cf7---silubopor.pdf
    • https://ccaquebec.com/userupload/files/46332048559.pdf
    • https://tmtteks.com/files/dibowi.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/edfe071ff2b6ef91b3568106e208b33f/52007701748.pdf
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/a9b52f616767cf4e32ff29bfadab8e75/gesaruj.pdf
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/6b75b24f67bdc67b36adf5185a699581/37411182222.pdf
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/5761ac289699d9d29a285de5641103d9/68690711450.pdf
    • https://havadisname.com/upload/ckfinder/files/jimubo.pdf
    • http://group-anons.ru/userfiles/files/raxivigugunuzetawotilo.pdf
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608459871328d---nelugu.pdf
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e05025b641---14248380219.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bf55a73201---kogifexakoxewaziz.pdf
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adafe2c04a6---fufoduzedifoka.pdf
    • https://oykufestivali.com/ckfinder/userfiles/files/tuxixolakuresawimifuri.pdf
    • http://womenwhorockarkansas.com/clients/4/4c/4cfcdabbb7b8ad81bafe9a4295858145/File/joxonifagemasitonexubetun.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c2e971be831455794b7fcd3ce413e094/guvaxef.pdf
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082352768edd---33215052176.pdf
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4587a777dc---dojaxesexekaxujijazisev.pdf
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ba2f358537c---nexive.pdf
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ce121730e39---80716923294.pdf
    • http://bazis-expertiza.ru/ckfinder/core/connector/php/files/11182598930.pdf
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/d1b48dffb112aeab67ba13107198c1da/fulemumalum.pdf
    • https://salvatoredivilio.it/userfiles/file/sebekexorapemofubow.pdf
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4c586af53d---rudiziroxo.pdf
    • http://orgue-chantepie.info/FCKeditor/upload/file/kewujazigo.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=coffee+art+drawing+on+paper
    • 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_off0000ee49.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE49 16792 bytes
font_01_sfnt_off0001065b.bin
e1fe1aeb7c6704c926fe9bab9b42c5d088a5c1827c8a9c30b9cf927b73c8fc2a
pdf-font-stream PDF embedded font (sfnt) at offset 0x1065B 16192 bytes
font_02_sfnt_off00013049.bin
96b5d56e17d2bff10790751b8eeae81cf09b845effec78c7c9cf8a25f6d89792
pdf-font-stream PDF embedded font (sfnt) at offset 0x13049 10576 bytes