Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a6d806101618a24…

MALICIOUS

PDF

94.0 KB Created: 2021-09-18 04:48:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a96ea62290314184f84dc9c1f5d78ed9 SHA-1: dfc690d2ed88c87f93933f80de316f5ddd631706 SHA-256: 8a6d806101618a248486a2a69d6e84ebf87c2f3bcacd02e1015710f392bedc6e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous external URLs, many of which are part of a link farm on disposable hosting, indicating a phishing or malicious redirection attempt. The presence of embedded URLs and the overall structure suggest it is designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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
  • 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://crysiq.ru/uplcv?utm_term=watch+kung+fu+panda+3+putlocker PDF link annotation
    • http://evo-models.com/uploads/userfiles/files/17392518995.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bbc60b1e6e---gerekisuku.pdfIn PDF document text
    • http://studiolorenzino.eu/userfiles/files/gijenezewulo.pdfIn PDF document text
    • https://yensaovinastar.com/media/files/89985854704.pdfIn PDF document text
    • http://discus-rus.ru/upl/file/62276173093.pdfIn PDF document text
    • https://euronuts2009.ge/files/files/3765932546.pdfIn PDF document text
    • https://fiscalonline.eu/app/webroot/files/userfiles/files/93797724348.pdfIn PDF document text
    • http://brandiassociati.it/userfiles/file/56033982843.pdfIn PDF document text
    • http://yeditepegumruk.com/userfiles/33821970838.pdfIn PDF document text
    • http://studiobonvino.com/userfiles/files/vatulelapamuvojuzujak.pdfIn PDF document text
    • https://vicareyou.com/userfiles/file/jugozulukogosasixovodobu.pdfIn PDF document text
    • http://solarhomepage.ch/fckeditor/editor/images/file/13377688338.pdfIn PDF document text
    • http://ch-yang.com/upload/files/muroviputizadozup.pdfIn PDF document text
    • http://zubrcup.by/files/files/vapoduroxetipubeni.pdfIn PDF document text
    • http://clubselectionvoyages.com/images/file/susokilagukavojinuxo.pdfIn PDF document text
    • http://brilsports.ro/userfiles/file///95079000673.pdfIn PDF document text
    • http://huzatfokozo.hu/editor_up/lajoxuzopilonub.pdfIn PDF document text
    • http://happyland-nsk.net/ckfinder/userfiles/files/sexojijetokifavinodaso.pdfIn PDF document text
    • http://medizator.ru/ckfinder/userfiles/files/48971937180.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133dabb71edd---todulokonutigevomozulelag.pdfIn PDF document text
    • http://yousefmaktabi.com/ckfinder/userfiles/files/74500688957.pdfIn PDF document text
    • http://delfosventures.com/userfiles/files/rotugukijuxokenis.pdfIn PDF document text
    • http://www.de.ruben.pl/ckfinder/userfiles/files/27634774411.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011bf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BF8 10996 bytes
SHA-256: ce6aae91c4a0d37201d848dc7488290d0ac2a0496ba5bdecd1036b45bb314d6c
font_02_sfnt_off00013559.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13559 20240 bytes
SHA-256: 1f7fe8977f3cbedb98465ea7b7246695b190d795b53af3bf7fd79f66e512cd2c

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