Malicious PDF — malware analysis report

Static analysis result for SHA-256 780e8d92e2f9ea15…

MALICIOUS

PDF

84.0 KB Created: 2021-06-30 05:19:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f760f0e0ddee9c5768615d8d46937ef5 SHA-1: 1e842f07b17b30527e9476deeddb3bdf9a7985ae SHA-256: 780e8d92e2f9ea15e8539bfe24feece95a39fca6f9b0870e9aa35061b640b5bb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF contains numerous links, many pointing to compromised CMS upload directories and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery through these links. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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 https://kasihpaham.com/contents//files/gutilaminivutex.pdf
    • http://garantc.ru/userfiles/file/18675962372.pdf
    • http://ptairsupply.com/userfiles/file/tapefetomagova.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c40ee9592c8---tomininufatomameterixolar.pdf
    • http://sigep60s-ncbeta.com/clients/44785/File/zipuxofobegomenig.pdf
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1609f4b88e9de8---84934986395.pdf
    • https://taxiparga.com/wp-content/plugins/super-forms/uploads/php/files/2ccc2dff8d661245a49b4d64ca3ee063/mewinadukijagezajupewisor.pdf
    • http://proreferee.ru/uploads/ckfinder/files/892618772.pdf
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/d9cbbdcd6b08ac666d1a7d687036b365/miriwipavifuwa.pdf
    • https://allcreaturesinc.com/files/files/29822184499.pdf
    • http://riggi.ru/userfiles/file/kixuxodawuzegivedir.pdf
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0ed26d920f---96078483704.pdf
    • https://oumkua.com/userfiles/file/71249881050.pdf
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/078694e5adcb89fddd6a238583eac38f/nezopesomojinesigefoxazev.pdf
    • http://www.morrisjones.co.uk/EditorImages/file/pawivatebojepixora.pdf
    • https://weddingitaly.jp/images/file/gimiwejiwasivabakakuvu.pdf
    • http://jeyadhurgatemple.com/userfiles/file/16645518081.pdf
    • http://1970fchs50thclassreunion.com/clients/1/19/19770213778af891f1b13fa25f964f50/File/26510999303.pdf
    • http://jtour.vn/userfiles/file/fuvakurapawoxunafisapen.pdf
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a15c7f61e66---65242873625.pdf
    • http://romanakladatelstvi.cz/userfiles/file/79544438755.pdf
    • http://olsztyntransportmedyczny.pl/userfiles/file/debaselozumuzenamuronaji.pdf
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16096b89f547cd---8422656734.pdf
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/hjf8ps7g6nlkbe95u8b9nr1s6v/maxawanokojujava.pdf
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/c0df67a2e51bddb17c4e46b9a4655571/kelij.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/h32j9b8g99o2pgdq7viqgt2kap/kadugerowor.pdf
    • http://eurogeographyjournal.eu/admin/fckfiles/file/2143732098.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=hockey+game+images
    • 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_off0000e62c.bin
994583277c1a6ad725c864a9bc99f0c53d940a423ed2c6f79c0f7ff8e0686837
pdf-font-stream PDF embedded font (sfnt) at offset 0xE62C 17156 bytes
font_01_sfnt_off000112df.bin
b79976362d74ab900155b37669c9b2ee112d1d197d8a8da9eaf1d6b034dc829a
pdf-font-stream PDF embedded font (sfnt) at offset 0x112DF 10420 bytes
font_02_sfnt_off00012a89.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12A89 16792 bytes