Malicious PDF — malware analysis report

Static analysis result for SHA-256 f386246aac8897a8…

MALICIOUS

PDF

49.7 KB Created: 2021-06-03 22:31:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6638e1f379974ebb3b198dff5ca0a14c SHA-1: 10755f36f1d5bc30425f05b60ec48d88b0bfdcb1 SHA-256: f386246aac8897a8aafeb0957864f3e8383025f8eea272a4ba6fde6997b9cff5
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 0.9796

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/how-to-get-free-robux-on-computer-game-hack PDF link annotation
    • http://library.yamasi.ac.id/repository/pubg-uc-logo_GM1330123889.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-minecraft-domain_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/how-to-get-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-hoe-to-get-extra-free-spins_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/tiktok-free-mockup_GM835599320.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/roblox-hacked-accounts-list_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/link-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/can-i-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-avatar-free_GM431946152.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_off000051ea.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51EA 28752 bytes
SHA-256: fb87e3d39e2b29e951f42923c4616ff76ce54b3301b2372590f2a58b2e24cb8b
font_01_sfnt_off00009173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9173 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00009e85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E85 18716 bytes
SHA-256: 2c87d7c74b7bcd7fade186f781764640e14dfaf637cd5e280742c056ede93ace

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