Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ae087741871096f…

MALICIOUS

PDF

38.5 KB Created: 2021-06-18 11:05:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 49832468486ee936c1b9a24cd0b4868d SHA-1: 01a4bfc05b3ac63118fd4eb80b39dfcb928db185 SHA-256: 4ae087741871096fd3f984368240c13f798ffde307cc86fabc5d0ef90bb1d48c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, with a primary lure pointing to a 'game hack' site. The ML classifier strongly indicated maliciousness, and the heuristic firings confirm the use of a game hack lure to redirect users. While no scripts were explicitly extracted, the nature of the embedded URLs suggests a phishing or scam attempt, likely leading to further malicious downloads or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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.co/app/431946152/new-code-speed-hack-roblox-game-hack PDF link annotation
    • http://akbidprimahusada.ac.id/elibrary//repository/roblox-2021_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/coin-master-free-daily-spins-2021_GM406889139.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/coin-master-free-coins-link-2021-deutsch_GM406889139.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/how-do-you-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/tiktok-likes-free-2021_GM835599320.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/pastebin-headless-horseman-free-roblox_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/lucky-patcher-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/how-to-get-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/coin-master-free-spins-bit-ly_GM406889139.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/roblox-avatar-editor-free_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/youyube-how-to-get-free-robux-that-working_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/coin-master-free-spin-whatsapp-group_GM406889139.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/roblox-banned-for-hacking_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/coin-master-gold-cards-free-2021_GM406889139.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/how-to-get-easily-promoted-on-roblox-groups-hack_GM431946152.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_off00003f35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3F35 22340 bytes
SHA-256: b7d0652eef7f41d3690bec32de9c40279e1938c8be10f9ed08e1783f6e032df9
font_01_sfnt_off00007117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7117 19168 bytes
SHA-256: d248e15e73950b5c030807f411274b33572cf3180a971c556a92cd4b0c6692ee

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