Malicious PDF — malware analysis report

Static analysis result for SHA-256 37424b5478a9885c…

MALICIOUS

PDF

43.4 KB Created: 2021-06-03 23:22:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ca2cc9b167663eb1acf63967975e1359 SHA-1: 1ceb5724f1fa42ade09eee5814c919802b8e68a2 SHA-256: 37424b5478a9885c9b97308576177f458fa0736ffbe52eaa82ef5d979fc1fb73
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'free Robux' and game hacks, directing users to a malicious URL. The ML classifier strongly flagged this PDF as malicious, and the embedded link is associated with a game hack redirector. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to a potentially harmful site, likely for credential harvesting or malware delivery.

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/rbx-land-free-robux-game-hack PDF link annotation
    • https://library.stikeswnpalu.ac.id/repository/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/pubg-uc-or-bp_GM1330123889.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-robux-only-username-no-human-verification_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-account-hacker-tool_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/tiktok-free-pizza_GM835599320.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/can-i-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-hack-version-download-2021_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-unlimited-spin-hack-apk_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/haktuts-coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/minecraft-name-tag-hacks_GM479516143.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-robux-stream_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-robux-pins_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_off00004ee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4EE5 24368 bytes
SHA-256: de44fa79948096519d6e9c8f4954230047020271c7fb1a5270b96c34c1afac4a
font_01_sfnt_off0000867d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x867D 18416 bytes
SHA-256: ed1846d837a30ccb27e25bdb955d82aabb746909bdcfb120b1e9cc4e6290fa01

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