Malicious PDF — malware analysis report

Static analysis result for SHA-256 f118f50bf67816f3…

MALICIOUS

PDF

84.2 KB Created: 2021-07-24 20:26:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ad4472befb0fb33bbf2f61614404670b SHA-1: 212453ce4955b3f649109656cbd6a935646d7c3a SHA-256: f118f50bf67816f335ef09627d203b92bc835e497ae345203e3903fc0c0f2582
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure indicate an attempt to lure users to external sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/38ur047orrsq9ns9038n5h0v1f/gupelizavowor.pdf
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/893c0f090ca00e198e9a623333cffd77/34754488130.pdf
    • http://profitoolinfo.ru/ckfinder/userfiles/files/nezatirobagefejufisa.pdf
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/27a19658fc09fac7d302006f4e4e186b/dibamabefogenefiw.pdf
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/tupoxo.pdf
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1607b7e70e2828---14259156906.pdf
    • http://4seasonstours.in/userfiles/file/gidigotatigolok.pdf
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bb0b73d9472---kavoxelenamedo.pdf
    • https://banghenails.com/upload/file/semipopegiratakupofivaben.pdf
    • https://aonetreks.com/uploads/file/44059355247.pdf
    • http://coming-c.com/userfiles/file/26970446258.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a95647a1f40---fuvimasavexekogo.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/1e66fb560d0446018b5d14b77ec0ebd3/nagidapojojixovok.pdf
    • http://tamlaproject.com/userData/board/file/walinerujiwof.pdf
    • http://chrisdepanneservices.fr/Sites/cds/files/9773178593.pdf
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/4tpnucsdk71pvgqg15b7u9mr40/50649415782.pdf
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf48c4469f---zilipewosixexipipudavelib.pdf
    • http://bajcsidavidfoto.com/_user/file/9036485608.pdf
    • https://patc.fr/imagesfile/46987882685.pdf
    • http://daydreamspin.com/userfiles/file/faturawodot.pdf
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/lcg3dmtk7ci8cdrvqrth000qcs/45588789538.pdf
    • https://dcoderesearch.com/uploads/58787478003.pdf
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160990e0e32557---vogabivoki.pdf
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16072862346bf7---pijokusadubibijixuzawek.pdf
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160b34006b6a71---72197632367.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=%D0%B3%D0%B4%D0%B7+8+%D0%BA%D0%BB%D0%B0%D1%81+%D0%B0%D0%BB%D0%B3%D0%B5%D0%B1%D1%80%D0%B0+%D0%BE+%D1%81+%D1%96%D1%81%D1%82%D0%B5%D1%80+2016
    • 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_off0000da19.bin
25d70128cce2a309d1df0a5bb8e25beb5ea594b2d126e9f449cf587d1b40e32d
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA19 11252 bytes
font_01_sfnt_off0000f4ba.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BA 16792 bytes
font_02_sfnt_off00010ccc.bin
9155e25efee084f7aa23b92258db0c13e4c539cfd7cb0dde9fd669bb06c94d89
pdf-font-stream PDF embedded font (sfnt) at offset 0x10CCC 20944 bytes