Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8828c1edc8ffd90…

MALICIOUS

PDF

46.7 KB Created: 2021-06-08 23:23:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 66727099ce5c2188188a824aa4fb4edc SHA-1: aad5ea0f0a79bda7845408ca192e64df53e5477d SHA-256: d8828c1edc8ffd90c3206cbf46d29438b839a1f9eb599d4bbd4af2f6ca9e2069
82 Risk Score

Malware Insights

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

The PDF file contains a high-confidence heuristic firing for a game hack redirect lure, pointing to a specific URL. The document body, though partially corrupted, also contains this URL and text related to game hacks. This suggests the primary goal is to trick the user into clicking the link to obtain a fake game hack, likely leading to a malicious download or further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.tw/app/431946152/rc7-roblox-download-free-game-hack PDF link annotation
    • https://elibrary.ikhac.ac.id/repository/how-to-download-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/oprewards-robux_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/coin-master-links-for-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-draw-2-roblox_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/minecraft-java-edition-code-free_GM479516143.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-summer-grl-free-roblox_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/roblox-hack-how-to-get-free-robux-unlimited-100-working_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/coin-master-free-spins-1701-20_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/coin-master-mod-apk-2021_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-to-play-minecraft-online-for-free_GM479516143.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/roblox-download-free-coins-apk_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/archery-master-3d-unlimited-coins-hack_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-to-get-free-minecraft-skins_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
stream_004_off00005412.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5412 26812 bytes
SHA-256: 34fe437eeca7772d0daa91205e5659ad1ac11193432a4a467bfb0fc9540c0dbd
font_01_sfnt_off000092b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92B3 18740 bytes
SHA-256: 449a3ebd072a6615b37250ccf2dee23c43649d8e294710ca5752943c91ea9935

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