Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f9f7a97c05d34bf…

MALICIOUS

PDF

50.6 KB Created: 2021-06-04 02:28:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: bae9d6f3d58722463b11d2cdf5448464 SHA-1: 3e20b3fe56d66d0e58559e4fd4b324b2ecccaa3b SHA-256: 3f9f7a97c05d34bf5273a9c8c790df00822ba4fdf9d9fdd5d0b6cc7243842fe2
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9779

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-coin-master-spins-for-today-game-hack PDF link annotation
    • http://digilib-unirow.ac.id/repository/free-roblox-clothes-for-your-avatar_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/free-pet-snacks-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/complete-offers-for-robux_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/free-robux-videos_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coin-master-free-spins-reddit_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coin-master-free-cards-hack_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/113-hacked-client_GM479516143.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coin-master-in-app-purchase-hack_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coin-master-spin-link-2021_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/how-to-get-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/can-pokemon-go-free-account_GM1094591345.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/minecraft-pe-hacks_GM479516143.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_off000054a4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x54A4 25548 bytes
SHA-256: a722f2b30c40dd50e613f83db7d5a7a0ebe5babb88f7b21fa44b780a7ba0cd42
font_01_sfnt_off00008ea1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EA1 8676 bytes
SHA-256: e06aca5f85e50ae6cefda302c5299c18ab6d27c174f74f0bb0ee8efa7ccb4468
font_02_sfnt_off0000a32c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA32C 18240 bytes
SHA-256: d9df8dbe390422ec07dea5627d06a62d2b41ea66987ed2cc99465e4bed745e59

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