Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdc5efcb0e023317…

MALICIOUS

PDF

35.4 KB Created: 2021-06-30 10:28:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: be8e9098690186afd7bb8b56e9266991 SHA-1: fe00804feb35eda0a7edc37a61d78a0df1e706bd SHA-256: fdc5efcb0e023317bb8a682850be3e40b68e0e5fb96012ce1cb4977d9e586768
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to a known malicious infrastructure, specifically advertising 'Coin Master Free Spins' and 'Robux hacks'. The primary malicious URL identified is http://netcdn.co/app/406889139/coin-master-free-spins-link-2021-game-hack. The document's content and embedded links strongly suggest a phishing or scam attempt designed to lure users to potentially harmful websites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/406889139/coin-master-free-spins-link-2021-game-hack In PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/como-conseguir-robux-gratis-en-roblox-2021-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-claim-spins_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-code-a-roblox-script-executor-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/inappropriate-roblox-games_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-robux-scams_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-get-10k-robux-for-free-2021-july_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-100-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-robux-codes-that-never-expire_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/try-minecraft-free_GM479516143.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-robux-accounts_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-robux-script-game-guardian_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/minecraft-cheat-client_GM479516143.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/nija-legend-roblox-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/hack-de-anonymous-roblox_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_off00003351.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3351 22684 bytes
SHA-256: 05524156b36e57969868c3cd7c7014bab85c0373bb50c19743c6553234a88da4
font_01_sfnt_off00006613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6613 18748 bytes
SHA-256: 785b8830476a1dba2603225cf55ebb3d3433825858fb25e5612ad86a59b30773

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