Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c19d592f9ba8e6e…

MALICIOUS

PDF

77.6 KB Created: 2021-09-19 10:12:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b85096aa99db7da28bc3d6550f69f29d SHA-1: 675cf53516c8336d06f0c7f51fb6a4f0b48e22a4 SHA-256: 8c19d592f9ba8e6edcbba6a615bcb45ee7682e06c9e2331c8284761393f1776c
124 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous external URIs, many of which are embedded within the document, suggests a phishing or redirection scheme. The PDF structure and embedded content are consistent with attempts to exploit vulnerabilities or trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7562

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • 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://archism.ru/uplcv?utm_term=photo+editor+collage+apk PDF link annotation
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614554c623a48---kuwiforabotofavumu.pdfIn PDF document text
    • https://crc.creativechange.net/ckfinder/userfiles/files/jokote.pdfIn PDF document text
    • http://vatlieubaooncachnhiet.com/userfiles/file/xabiboromizejavideri.pdfIn PDF document text
    • http://wingprocess.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zinanaberedewusekurefotov.pdfIn PDF document text
    • https://mgs-on-track.com/app/webroot/userfiles/file/30271348375.pdfIn PDF document text
    • http://www.investinwielkopolska.pl/application/lib/ckfinder/userfiles/files/lixavazazugi.pdfIn PDF document text
    • http://thenikharvconsultancy.com/userfiles/file/8192112471.pdfIn PDF document text
    • http://phutunggiahungoto.com/uploads/files/83187203272.pdfIn PDF document text
    • http://erh-hu.com/userfiles/file/27530562346.pdfIn PDF document text
    • http://rehahomecare.com/upload/editor/files/todixufavabu.pdfIn PDF document text
    • http://ahkkpcm.org/userfiles/96566492401.pdfIn PDF document text
    • http://shangrilayunnan.com/ckfinder/userfiles/files/nawowoxoxosid.pdfIn PDF document text
    • http://saothienemb.com/uploads/images/files/kipebabesixonema.pdfIn PDF document text
    • http://kukdae.com/files/fckeditor/file/gitaworidaruderofinaluliw.pdfIn PDF document text
    • https://asthasupermarket.com/userfiles/file/73107187784.pdfIn PDF document text
    • https://wupaojichangjia.com/d/files/26538353120.pdfIn PDF document text
    • http://lighthouse-connection.at/myPix/file/jabimik.pdfIn PDF document text
    • http://moscowfashion.net/content/xuploadimages/file/25314754560.pdfIn PDF document text
    • http://elskup.pl/images/assets/file/mojuwuforikuku.pdfIn PDF document text
    • https://vishalahospitality.com/ckfinder/userfiles/files/buzejuzabixadidaxola.pdfIn PDF document text
    • http://idominjazz.com/fckeditor/userfiles/image/bufopojef.pdfIn PDF document text
    • http://kondicionery-dzerzhinskij.ru/upload_picture/file/4288887082.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613958b2d4b6e---nakonukigemunimibume.pdfIn PDF document text
    • http://onlinemidias.com/ckfinder/userfiles/files/nodamareduj.pdfIn PDF document text
    • 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_off0000e447.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE447 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC5E 10616 bytes
SHA-256: 77739970634d5e124b76f0f9502cb3165c3e37e412f62faa8061d623cf0843e7

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