Malicious PDF — malware analysis report

Static analysis result for SHA-256 52b910059454c6e1…

MALICIOUS

PDF

34.2 KB Created: 2021-06-28 11:53:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 54d595be27079a2fc6c1055eb8de0001 SHA-1: d4b05da6685b21231989d88b8a7f3bb568c99ea9 SHA-256: 52b910059454c6e19fe1d31a0199762b22a8a7b4f005da4841a02233e88031cd
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple embedded URLs and a document body that explicitly advertises 'free game hacks' and 'free accounts' for popular games like Roblox. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' confirms this malicious intent. The primary IOC is the redirector URL, which likely serves as a gateway to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/roblox-bc-accounts-for-free-game-hack PDF link annotation
    • http://pustaka.ust.ac.id/repository/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/hacks-for-roblox-parkour-fly_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/give-me-some-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-hack-robux-free-deutsch-download_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-get-free-clothes-on-roblox-without-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-hack-spins-apk-download_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-robux-quick-easy-cheat_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-cards-2021-codes_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-case-clicker-hack-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/jailbreak-roblox-money-hacks_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-app_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-rewards-app_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/beyond-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-get-minecraft-for-free-on-android_GM479516143.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_off00002e80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E80 22480 bytes
SHA-256: 65820a754a25c34067131e6f2d6b8ff8e3439ebde7361e91defe2b9efa860038
font_01_sfnt_off000060da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60DA 18896 bytes
SHA-256: 32e3c6a82a5fe39f4bc3ae8682a17da39916dd4149d0cc29005ed2f0bf344916

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