Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b3cc16b3788720b…

MALICIOUS

PDF

43.6 KB Created: 2021-06-03 22:49:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 01c7e435fa73f5b6ba3bf5c2ef187ac1 SHA-1: 38fa3d6999896c7c54af4b776e1b83d1c80bae82 SHA-256: 5b3cc16b3788720b11debb0907a7be274195a1f9a72ebd838d7315e296803046
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites offering game hacks and free spins, a common lure for phishing or malware distribution. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' specifically flags this behavior. While no scripts were extracted, the embedded URLs are the primary indicators of malicious intent, likely leading to a second-stage download or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.online/app/431946152/roblox-free-bundles-game-hack PDF link annotation
    • http://perpus.polimarim.online/repository/free-spins-coin-master-2021-no-verification_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-coin-master-spins-link-download_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-coin-spin-daily-link-net_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/earn-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/how-to-get-robux_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/spin-rewards-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/earnrobux_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/coin-master-free-spins-2021-generator_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-roblox-accounts-generator_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/coin-master-hack-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-robux-no-password_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/get-free-robux-no-human-verification_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
stream_004_off00004eab.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EAB 24892 bytes
SHA-256: a1ee81c1839d4c7321652b001047c5890b261da4328f5b7b16e26abb829836f7
font_01_sfnt_off000087a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87A5 18260 bytes
SHA-256: ed73f26fe39a6ceec3b8cb9f78cb2769c99c91aa7d74f7e016d55c21fe231794

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