Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ecd60525212f8cd…

MALICIOUS

PDF

41.5 KB Created: 2021-04-23 16:22:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 99eefee5f5513204eaeadbe14985cc38 SHA-1: 25357bb4e8738873d4eb84ac86fa4b7b482ecacb SHA-256: 5ecd60525212f8cde28caefe6475f5bd993041a4a61c8fc70bf01a2f11591499
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document employs a game hack lure, specifically targeting Roblox players, to trick users into visiting a malicious URL. The primary link impersonates Facebook to increase user trust, but redirects to a suspicious domain. While no scripts were directly extracted, the PDF structure and embedded links suggest a potential for exploitation or further payload delivery.

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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netsecure.top/app/431946152/lemon-aid-roblox-hack-game-hack.
  • 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.top/app/431946152/lemon-aid-roblox-hack-game-hack PDF link annotation
    • http://uas.com.my/uploaded_files/userfiles/files/those-of-us-who-remain-cheats-roblox.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/real-hack-for-robux-inspect.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/inject-hack-com-roblox-robux.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/how-to-get-free-robux-without-having-to-do-anything.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/descargar-hack-roblox-robux.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/free-roblox-promo-codes-december-2021.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/hacks-to-fly-in-roblox.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/grow-box-free-robux.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/roblox-apps-info-roblox-robux-hack-generator.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/how-to-get-limited-items-on-roblox-for-free.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_off00004122.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4122 26500 bytes
SHA-256: b2b1ec4c3bc92fe1c1cce3e172c67cf23089ea853eb021fd9614379742a0720f
font_01_sfnt_off00007f3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F3F 18736 bytes
SHA-256: 7adda1af19ec1be5f3b2e245bcb9d77c307ef183472e22536ed36966009a2714

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