Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fc97b16d36c9f55…

MALICIOUS

PDF

45.5 KB Created: 2021-06-03 23:16:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 0167d92e3e42e61dc829b3e69a4c993b SHA-1: cc243c92bf76ad8d0adefccc928d6ae2130ca1f2 SHA-256: 3fc97b16d36c9f5545d97071d27ad037f21130ebffa918dcd32db27edae42732
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a known malicious domain, masquerading as a game hack generator. The document body and heuristics indicate a lure for free game currency or cheats, which is a common social engineering tactic. No scripts were extracted, but the primary malicious functionality appears to be the redirection to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 4

  • 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.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/free-robux-games-that-actually-work-2021-game-hack In PDF document text
    • http://e-library.akademitelkom.ac.id/repository/coin-master-hack-ios_GM406889139.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/coin-master-hack-spins-apk_GM406889139.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/free-coin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/coin-master-hack-using-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/robux-robux_GM431946152.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/how-to-get-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/coin-master-twitter_GM406889139.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/coin-master-fan-hack_GM406889139.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/minecraft-login-free_GM479516143.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/robux-online_GM431946152.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/roblox-premium-free_GM431946152.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/coin-master-free-spins-generator-no-human-verification_GM406889139.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/how-to-change-roblox-username-for-free_GM431946152.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • https://collectrobux.coIn 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_off000051d0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51D0 24780 bytes
SHA-256: e67e1fcfe0c8d58fa7105ba82a918bff28ac3bd7217042595b9034cba1faf0ea
font_01_sfnt_off00008aad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AAD 19796 bytes
SHA-256: 825df7cf396e8d9c124972fb8483e304b72a256d7e3507e7d5ad5df48b88867f

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