Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b083237ecccc21e…

MALICIOUS

PDF

47.2 KB Created: 2021-05-15 17:06:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 0ccccc4b9196de52931418c43bf19639 SHA-1: 9df431d1a48ed0218fb454ac7ff537f9a2cad8e2 SHA-256: 8b083237ecccc21eb68568e5a85fe29c9cdbe97ac891bda92ea175b336ae13b2
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 0.8948

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.xyz/app/431946152/best-way-to-get-free-robux-game-hack PDF link annotation
    • http://huananhai.net/images/minecraft-hack-2021_GM479516143.pdfIn PDF document text
    • http://huananhai.net/images/coin-master-free-coins-and-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://huananhai.net/images/coin-master-unlimited-spins-hack_GM406889139.pdfIn PDF document text
    • http://huananhai.net/images/free-spins-and-coins-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://huananhai.net/images/minecraft-free-download-linux_GM479516143.pdfIn PDF document text
    • http://huananhai.net/images/minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://huananhai.net/images/how-to-downgrade-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://huananhai.net/images/coin-master-free-spins-iphone_GM406889139.pdfIn PDF document text
    • http://huananhai.net/images/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://huananhai.net/images/coin-master-working-hack_GM406889139.pdfIn PDF document text
    • http://huananhai.net/images/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://huananhai.net/images/robux-generator-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://huananhai.net/images/roblox-devil_GM431946152.pdfIn PDF document text
    • http://huananhai.net/images/hack-coin-master-32-mod-apk_GM406889139.pdfIn PDF document text
    • http://huananhai.net/images/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://huananhai.net/images/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://huananhai.net/images/claim-free-robux_GM431946152.pdfIn PDF document text
    • http://huananhai.net/images/coin-master-daily-gift-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://huananhai.net/images/free-robux-pins_GM431946152.pdfIn PDF document text
    • http://huananhai.net/images/how-to-get-free-coins-on-coin-master_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_003_off00004a1f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A1F 26340 bytes
SHA-256: 6a72c3b516a2c57c79d1ccb04e737242d8451b45c2e53a4d5a1baa5e1787de75
font_01_sfnt_off000087ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87AB 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off000094bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94BD 18724 bytes
SHA-256: 0e67c697191027b8b448214b8413bf6f3ed0ff1165507b95d6a34aabcad7a82f

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