Malicious PDF — malware analysis report

Static analysis result for SHA-256 32b9e1be70863a28…

MALICIOUS

PDF

46.2 KB Created: 2021-06-03 09:46:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7fa6323a5b80d593b92f3c216a7a8ca2 SHA-1: 7907e299efcf6924f4da42ebdc46b4d33c4cc747 SHA-256: 32b9e1be70863a289d117ed0d933db93b64b8172c6f8cb176de5bc9cc0b7e60c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a prominent link to a 'free generator / game hack' for Coin Master, a common lure for malicious content. The ML classifier also flagged this PDF as malicious. While no scripts were directly extracted, the PDF structure and embedded URI heuristics indicate a phishing or redirection attempt, likely leading to a second-stage download or exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9797

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/406889139/free-spin-link-for-coin-master-game-hack PDF link annotation
    • https://perpustakaan.stifar.ac.id/repository/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/minecraft-windows-10-edition-free-download_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/coin-master-cards-hack_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/how-do-you-get-free-daily-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/free-admin-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/free-robux-com-real_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/free-minecraft-printables_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/minecraft-thumbnail-maker-free_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/rbx-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/coin-master-hack-unlimited-spins-game-download_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/cpbildco-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/hack-coin-master-free_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/free-robux-mobile_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/coin-master-free-cards-link_GM406889139.pdfIn 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_off000050b5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50B5 24376 bytes
SHA-256: 28f74d8734a977d5e4bbf83828bf87be6721c1ec7740888045318d23f54b86f2
font_01_sfnt_off00008876.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8876 2896 bytes
SHA-256: 98478e2fbfabd582329b6206c0d46f67523cf5e299cb16118f1065b4dd5ec6a6
font_02_sfnt_off0000925d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x925D 18056 bytes
SHA-256: b406b504177f6b640bc1dbcd325e02770f8a0621b64b682f119f0b5c1d0e735d

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