Malicious PDF — malware analysis report

Static analysis result for SHA-256 4127e90335b720b0…

MALICIOUS

PDF

42.2 KB Created: 2021-04-22 15:52:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 44cbda6bef2bc3e950dcc7e550f5af1c SHA-1: 8e59babd9e6396d26e20c1e1392cca466fc330ca SHA-256: 4127e90335b720b0e12a55793d586ed2a47e5f9f056f73f891ddbb5bfc8717d0
110 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a prominent link disguised as a game hack generator, which is a common lure for phishing or malware distribution. The ML classifier strongly indicated maliciousness, and the document body contains multiple URLs pointing to similar game-related lures. The primary malicious URL is https://netsecure.pro/app/431946152/bleu-roblox-hack-key-game-hack, which likely serves as a landing page for further malicious activity.

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/bleu-roblox-hack-key-game-hack PDF link annotation
    • http://facingachild.org/images/free-shaggy-old-roblox.pdfIn PDF document text
    • http://facingachild.org/images/free-robux-no-offers-or-survey-2021.pdfIn PDF document text
    • http://facingachild.org/images/roblox-free-op-scripts.pdfIn PDF document text
    • http://facingachild.org/images/how-to-add-script-on-roblox-hack.pdfIn PDF document text
    • http://facingachild.org/images/roblox-booga-booga-free-acounts.pdfIn PDF document text
    • http://facingachild.org/images/free-cinema-4d-lightroom-roblox.pdfIn PDF document text
    • http://facingachild.org/images/how-to-make-an-account-on-roblox-laptop-for-free.pdfIn PDF document text
    • http://facingachild.org/images/how-to-get-perm-admin-on-any-roblox-game-free.pdfIn PDF document text
    • http://facingachild.org/images/how-to-get-free-roebucks-in-roblox-2021.pdfIn PDF document text
    • http://facingachild.org/images/roblox-island-royale-script-2021august-hack.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_off00004190.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4190 28916 bytes
SHA-256: 387152d8ffa2ddc2c4e496b04a5c6fc2fc1e92b2b30c168c128ceb023ca04746
font_01_sfnt_off000082b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82B6 18504 bytes
SHA-256: e2381bee91605f1c3ba485f4ebaa9c2502b9c5a6dff27db01eb72df230e4df3e

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