Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5042a442cec949a…

MALICIOUS

PDF

117.2 KB Created: 2021-07-30 22:43:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2a8b94fd23ba6d2b65235429a074cc30 SHA-1: 938ea1d1e56800bb2d3262cc46fd188d3758c218 SHA-256: e5042a442cec949a326860b9a1927de879d155d4e556129cc42dcad29efcda2a
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous embedded URLs pointing to various websites. Several of these URLs are hosted on compromised CMS upload directories, suggesting an attempt to leverage legitimate but compromised infrastructure for malicious distribution. The presence of these links indicates a potential phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7530

Heuristics 5

  • 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
  • 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://lapawan15.com/shop/fck_file/file/tibotezijololitusatuwoje.pdf In PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a787a4a95ee---58068585950.pdfIn PDF document text
    • https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160782bdccbb42---30104970211.pdfIn PDF document text
    • https://webhosting4.net/media/file/najesebof.pdfIn PDF document text
    • https://bozoklar.org/ckfinder/userfiles/files/31820572239.pdfIn PDF document text
    • http://profesniprukaz.cz/ckfinder/userfiles/files/wasomisewisekizedaxuw.pdfIn PDF document text
    • http://qiangka.com/ckfinder/userfiles/files/gafonedopiwetutowabivu.pdfIn PDF document text
    • http://esthebel.de/userfiles/file/gavizasasorenep.pdfIn PDF document text
    • http://nsdadventist.org/FCKData/file/jebezevuvejofowaru.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/161027d38f1b41---27605949015.pdfIn PDF document text
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/boxinoxorofirixakexek.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/48c22a6b009a49ee03b85fbd7ec34f49/4234466716.pdfIn PDF document text
    • http://www.bash.cl/media/file/gukugiv.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/0de1e33462546962e9bfbc15d550cfca/19433889604.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8db587f6a---20394039163.pdfIn PDF document text
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/6iv6g0ue0b088rrak6fnfnfe5p/mewevasawijedilaf.pdfIn PDF document text
    • http://dent-pro.cz/pic/file/xozeditababujimen.pdfIn PDF document text
    • https://www.adoz.cz/ckfinder/userfiles/files/waleragibu.pdfIn PDF document text
    • http://brmxn.com/userfiles/file/20210628132348_0afk0c.pdfIn PDF document text
    • https://gregor-biffiger.ch/userfiles/file/69349050032.pdfIn PDF document text
    • http://lucann.com/Upload/file/puzarividesebofazopisofa.pdfIn PDF document text
    • https://vieclamhanoi247.com/upload/files/23977451770.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/19208762e8877513ebd4ffbb380323b3/xisinosudo.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/5f33f156bd2c0a858de7bd8a5c808569/14880718096.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8b780b5ff8---lokezeluvalog.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=mame+0.139+u1+roms+metal+slug+6PDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017f25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F25 11096 bytes
SHA-256: 2583ce55303bb13200f887ec405f74db13d2759b40a8ae28a00523debc18d07f
font_01_sfnt_off00019917.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19917 19132 bytes
SHA-256: dcd49398280e5c3970ad14cf07c2355cf5a075797998985fe5da2fbc871695b5