Malicious PDF — malware analysis report

Static analysis result for SHA-256 dffe0b478aad9e5e…

MALICIOUS

PDF

47.8 KB Created: 2021-06-03 12:34:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: e7f1d142ee9f4ebcd2e3fd99f664a89d SHA-1: 9c625ec262c9992bd20b3d161c1eb31019033578 SHA-256: dffe0b478aad9e5e4767fa5d5ff9d3373019de78d333b20e7b3f43616393f7d9
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 suspicious URL. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a phishing or scam attempt to redirect users to potentially malicious content. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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/free-robux-no-human-verification-game-hack PDF link annotation
    • https://elibrary.ikhac.ac.id/repository/how-to-hack-golden-card-in-coin-master_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/roblox-hacked-version_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-to-get-minecraft-windows-10-for-free-with-java_GM479516143.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/roblox-free-hair-girl_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/cmaster-club-coin-master-hack-tool_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/tiktok-for-free-online_GM835599320.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/numero-card-robux-50-free_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-do-you-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/pubg-uc-via-login_GM1330123889.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/blox-best-robux_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/minecraft-for-free-games_GM479516143.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-coins-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/coin-master-free-coins-generator_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/all-minecraft-handbooks_GM479516143.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/ac-market-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/promo-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.roblox.comIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004fea.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FEA 25424 bytes
SHA-256: e39cb90fe9540b782492aeedb1947ee4f4d6376143108b96accefbe8227ed7f7
font_01_sfnt_off00008b5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B5D 3400 bytes
SHA-256: 75c3a8e6f5c68e0746f893c922e57fd7e888a21fb038f9ae3eedb0a197a59e24
font_02_sfnt_off00009680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9680 18860 bytes
SHA-256: 7bf6b254896799c3550cbaf8339a45bd8c79022df116fd793fc899e49cde55bc

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