Malicious PDF — malware analysis report

Static analysis result for SHA-256 83776f838b7ca7a2…

MALICIOUS

PDF

41.9 KB Created: 2021-05-16 03:48:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c16b421fc4ce10075e459909b21182d6 SHA-1: 201ebed4698a7758a6ce2a4cee1a3edb8f50f0cd SHA-256: 83776f838b7ca7a2ae3c97d9cc1c1be8823b11e3157330f8d13947cd6385c82d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-severity heuristic indicating it links to a 'free generator / game hack' lure. The embedded URL, https://netcdn.xyz/app/406889139/moon-active-games-game-hack, likely serves as a redirector to a malicious payload. The document body, though heavily obfuscated, contains references to game hacking and download prompts, reinforcing the lure. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/406889139/moon-active-games-game-hack PDF link annotation
    • http://adveos.com/images/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • http://adveos.com/images/how-to-hack-coin-master-cheat-engine_GM406889139.pdfIn PDF document text
    • http://adveos.com/images/minecraft-pe-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • http://adveos.com/images/coin-master-download_GM406889139.pdfIn PDF document text
    • http://adveos.com/images/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • http://adveos.com/images/free-coins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://adveos.com/images/coin-master-hack-android-no-root_GM406889139.pdfIn PDF document text
    • http://adveos.com/images/free-roblox-pin-codes_GM431946152.pdfIn PDF document text
    • http://adveos.com/images/robux-free-robux_GM431946152.pdfIn PDF document text
    • http://adveos.com/images/mcpe-master-hack-unlimited-coins-download_GM406889139.pdfIn PDF document text
    • http://adveos.com/images/freespinandcoin_GM406889139.pdfIn PDF document text
    • http://adveos.com/images/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://adveos.com/images/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://adveos.com/images/free-roblox-generator_GM431946152.pdfIn PDF document text
    • http://adveos.com/images/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://adveos.com/images/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://adveos.com/images/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://adveos.com/images/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://adveos.com/images/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • http://adveos.com/images/robux-earner_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_003_off00004b18.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B18 24688 bytes
SHA-256: d8762aea56afffc056fee538807c359657284612ca9201dad1d91dcda7c04900
font_01_sfnt_off00008250.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8250 17920 bytes
SHA-256: 6572202fb11b79787028deba1beb076b209f1779d589edab2c04e97f197d6ee2

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