Malicious PDF — malware analysis report

Static analysis result for SHA-256 06c821619fe07b4c…

MALICIOUS

PDF

78.0 KB Created: 2021-09-04 00:56:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ea2d004a978efe765b887056003dd659 SHA-1: 972277ab8b2f23efcc379b06f254239dfadad3f8 SHA-256: 06c821619fe07b4cad24128f793de3feca6a1719b64f8272e152d4422d31f4f5
154 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to potentially compromised websites, suggesting a phishing or malware distribution scheme. The presence of multiple unknown URLs further supports this, as they are likely used to host or redirect to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5230

Heuristics 5

  • 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
  • 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://ajivikafinance.com/userfiles/file/resib.pdf In PDF document text
    • https://adasms.fr/userfiles/file/dadenulagupobuzuwiribe.pdfIn PDF document text
    • https://ienter.bg/files/21274185713.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/c027614ed41abfffde65d44dbd0e21a0/tesegukijenaf.pdfIn PDF document text
    • https://butchercurnow.com/img/shop//contents/64633064963.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160af7338b15de---40575020701.pdfIn PDF document text
    • https://renault-service.com/userfiles/34880721881.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/18174624596.pdfIn PDF document text
    • http://tbvshungviet.com/upload/files/rapajuteninepazajaz.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612172291423e---rijuviviwumowalizibagap.pdfIn PDF document text
    • https://cmottaviproductive.it/uploads/file/87492463994.pdfIn PDF document text
    • http://archi-m.ru/userfiles/file/jigonakok.pdfIn PDF document text
    • http://hissekurban.com/resimler/files/fotokupuzuwafaje.pdfIn PDF document text
    • https://censcakmu.org/board/file/files/felurirumumuwunadujore.pdfIn PDF document text
    • http://chi-kara.net/userfiles/file/vemazenomi.pdfIn PDF document text
    • https://washlounge.in/ckfinder/userfiles/files/zefexemuz.pdfIn PDF document text
    • http://kocavietnam.com/upload/files/6101701910.pdfIn PDF document text
    • http://nousgarage.com/userfiles/file/ginedetepikesitogura.pdfIn PDF document text
    • http://yogathoitrang.com/quangbasanpham/app/webroot/upload/image/files/getaritodegejizexeg.pdfIn PDF document text
    • http://oralrem.kz/ckfinder/userfiles/files/rodexonubotegukabo.pdfIn PDF document text
    • https://telenovella-bg.com/files/tuzedanovo.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160a4decb18812---34199438687.pdfIn PDF document text
    • http://agierresrl.it/userfiles/files/teninapupexisitesotono.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=gastroenterologia+villalobos+6+ed+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA7 11084 bytes
SHA-256: c53cec02e99ae5d4b222396021432f0471a4a7987c4fe0a07133a5489084b8b1
font_01_sfnt_off00010544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10544 20184 bytes
SHA-256: d089ded4151225452ff216ac07911249c63545e31322b57f948668b8b80b29ac

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