Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fc69c82110e8b76…

MALICIOUS

PDF

34.5 KB Created: 2021-07-19 17:54:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 045515249491a56af25ef70542039f59 SHA-1: d3b83c4d8694adb0dfe8925911c88b0376d0f48a SHA-256: 6fc69c82110e8b766e6bf524a407ebb24b34602c37a91fac6e414a163e7a2b8f
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 0.9955

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 http://netcdn.tw/app/406889139/coin-master-daily-free-spins-blogspot-game-hack PDF link annotation
    • http://rafaelmontesinos.com/images/how-to-get-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • http://rafaelmontesinos.com/images/minecraft-windows-10-free-code_GM479516143.pdfIn PDF document text
    • http://rafaelmontesinos.com/images/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://rafaelmontesinos.com/images/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://rafaelmontesinos.com/images/minecraft-skins-free-girl_GM479516143.pdfIn PDF document text
    • http://rafaelmontesinos.com/images/minecraft-realms-free_GM479516143.pdfIn PDF document text
    • http://rafaelmontesinos.com/images/minecraft-account-hacked_GM479516143.pdfIn PDF document text
    • http://rafaelmontesinos.com/images/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://rafaelmontesinos.com/images/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://rafaelmontesinos.com/images/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002d2f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2D2F 23980 bytes
SHA-256: ffb73570cae46d1d458a9e2537306b94bd33d545780157363d2377db8eddeb46
font_01_sfnt_off00006357.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6357 18812 bytes
SHA-256: 99efaab321cd8bd4771148dad361c5d136942e4fae15d22f58752892cb19a04e

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