Malicious PDF — malware analysis report

Static analysis result for SHA-256 55c5fead2280bb43…

MALICIOUS

PDF

42.1 KB Created: 2021-04-28 22:42:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 6572f0b5ca89ee5fbfbee9bf4e4f8077 SHA-1: 41bab687f20cbc8c23c8640c28c3abaaff0d9937 SHA-256: 55c5fead2280bb43cecc0615799cc0c555848182b09643b6d26c93fbb44a660a
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, with a primary focus on 'game hacks' and 'free generators'. The ML classifier strongly flagged this PDF as malicious. The presence of urgency and download button lures further supports a malicious intent to trick the user into clicking these links. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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 https://netcdn.xyz/app/431946152/sword-hack-script-roblox-game-hack PDF link annotation
    • http://repository.poliven.ac.id//repository/husky-roblox-free-robux-link.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/roblox-sprinting-simulator-cheats.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/how-to-get-wings-fo-free-roblox.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/free-roblox-gift-card-codes-2021.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/roblox-best-free-items.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/roblox-hack-without-human-verification-or-survey.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/jailbreak-roblox-free-money-hack.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/roblox-cheat-2021-fr.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/roblox-trolling-hack.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/how-to-hack-a-2021-roblox-account.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_off0000439e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x439E 27356 bytes
SHA-256: 953d5fc9846a69edbaeb59598918a669ff45d2c1f2a60e7811cefdb49fb5ae12
font_01_sfnt_off000080fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80FA 18920 bytes
SHA-256: 8fa796396d2550bcaa991e4bf05cad7e5b400dcf460929a7f72c6c47db57cd20

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