Malicious PDF — malware analysis report

Static analysis result for SHA-256 8367fe4924440431…

MALICIOUS

PDF

62.5 KB Created: 2021-04-18 14:08:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c0fd0a4c6ad9862445e20b77ec2dfac SHA-1: 99b06f7f48b892db0cffa4c50ac6016c32ed0156 SHA-256: 8367fe4924440431734c8d01f5c323dea64567e9d955f64785ced0ed4c2bf258
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded links, many of which are hosted on disposable domains and appear to be part of a link farm. The document body, though heavily obfuscated, contains references to 'Fifty Shades of Grey movie book' and the wkhtmltopdf application, suggesting a lure to disguise the malicious nature of the links. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or redirection to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8474

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://www.termis.org/system/files/webform/776381217.pdf
    • https://www.jts.org.jo/sites/default/files/webform/1653940235.pdf
    • https://www.mothercare.ro/sites/default/files/webform/resumes/28941778760.pdf
    • http://spotlight-sites.com/sites/default/files/webform/44923699615.pdf
    • http://www.friendlycc.com/sites/default/files/webform/zuguxinukebezukul.pdf
    • https://www.visitsavannah.com/sites/default/files/webform/mubojezelu.pdf
    • https://www.visitsavannah.com/sites/default/files/webform/59391310887.pdf
    • https://www.osgeurope.com/sites/osg-corporate.dev/files/webform/memirudomonejusowanasu.pdf
    • https://www.enwidth.com/sites/default/files/webform/resumes/palepipob.pdf
    • http://www.pacificsportfraservalley.com/sites/default/files/webform/newusagolepilukakatukus.pdf
    • https://www.termis.org/system/files/webform/manejuwavujegajejumoxak.pdf
    • http://russian-ice-spb.ru/sites/default/files/webform/files/loxigexaxezirizedud.pdf
    • https://www.afscme65.org/system/files/webform/52844377902.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=fifty+shades+of+grey+movie+book
    • https://minorsoncampus.princeton.edu/system/files/webform/97035559296.pdf
    • https://umatter.princeton.edu/system/files/webform/requests/72435273025.pdf
    • https://printandmail.princeton.edu/system/files/webform/fasulegok.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc32.bin
2b7c01dfe4de96b2d21038c33a8eb13fa680c8fcd9aa5a6c12867aed0e2b793a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC32 5612 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.