Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bcb131ae586874f…

MALICIOUS

PDF

41.4 KB Created: 2021-04-22 20:33:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b72a63b0bb572b5ba63b13cf15398d2d SHA-1: c1cd97d64609eae146427e66b2062266444e1817 SHA-256: 4bcb131ae586874f332edba46072e5a0d769b14d895609ab318359eaeb65a3e3
110 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document body and heuristics indicate a lure for free in-game currency, specifically 'Robux', which is a common phishing tactic. The embedded URL and numerous other URLs point to sites offering hacks or generators, likely leading to credential harvesting or malware. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • 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://netsecure.pro/app/431946152/get-free-robux-no-human-verification-2021-game-hack PDF link annotation
    • http://mycounty.com.ua/images/free-black-hair-in-roblox.pdfIn PDF document text
    • http://mycounty.com.ua/images/how-to-get-a-free-skin-in-strucid-roblox.pdfIn PDF document text
    • http://mycounty.com.ua/images/roblox-free-clothes-hack-mobile.pdfIn PDF document text
    • http://mycounty.com.ua/images/roblox-sunset-city-money-hack-2021-patched.pdfIn PDF document text
    • http://mycounty.com.ua/images/how-to-hack-an-old-roblox-account.pdfIn PDF document text
    • http://mycounty.com.ua/images/roblox-shard-online-hack.pdfIn PDF document text
    • http://mycounty.com.ua/images/free-robux-2021-december.pdfIn PDF document text
    • http://mycounty.com.ua/images/roblox-kick-off-hack-download.pdfIn PDF document text
    • http://mycounty.com.ua/images/roblox-wall-hack-2021.pdfIn PDF document text
    • http://mycounty.com.ua/images/how-to-get-free-auto-clicker-for-roblox.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
stream_003_off0000418d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x418D 26388 bytes
SHA-256: f2c66caa20524b9999142ab14fc8dc6ea3af88eb747d2863d0848d68c0c897ef
font_01_sfnt_off00007d38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D38 19260 bytes
SHA-256: 107805196c3736a71801906a891eb178d47a67430208840c7676c36da5285467

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