Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ff79654bf8a2ce9…

MALICIOUS

PDF

33.3 KB Created: 2021-07-20 15:02:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f8961ad55a63e21109ec9bf5a21d7cbf SHA-1: 55362d8f811bbe0848efbafde667852ee40a6ffa SHA-256: 2ff79654bf8a2ce919d526f36dc153de2634739dc6ca4b5a56abd50117111a7c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://netcdn.tw/app/431946152/free-robux-no-password-game-hack PDF link annotation
    • http://depelem.fr/images/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • http://depelem.fr/images/minecraft-mobile-free_GM479516143.pdfIn PDF document text
    • http://depelem.fr/images/how-to-get-minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • http://depelem.fr/images/is-minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • http://depelem.fr/images/best-free-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://depelem.fr/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://depelem.fr/images/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://depelem.fr/images/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • http://depelem.fr/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://depelem.fr/images/minecraft-windows-10-edition-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002c71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C71 22288 bytes
SHA-256: 10fd89aa5ee312afc378cc6f0e3f9fcc2a8c3ed6931937b234ec2ddaddf61234
font_01_sfnt_off00005e15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E15 18920 bytes
SHA-256: e32cd2d9ef9c7d65ca6dcb56925fdb086d69ea06ee0e8757ce45dcc04a676380

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