Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba2d515dd396f8f3…

MALICIOUS

PDF

41.7 KB Created: 2021-05-10 16:07:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 899fd569c69904c3ce2e7054253e52f9 SHA-1: a8f92a7fa385825572da473a67ec0cfed0f2ab2d SHA-256: ba2d515dd396f8f33052d8c76f36b2ba663c7705d1f601b438ba9fc1977551ae
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 0.9623

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/stock-speed-coin-master-free-spins-game-hack PDF link annotation
    • http://fmbompastor.com.br/images/coin-master-free-coins-generator_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/coin-master-daily-gift-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/ac-market-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/free-robux-apk_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/free-roblox-clothes-boy_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/best-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://fmbompastor.com.br/images/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/coin-master-hack-using-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/https-rbx-place-rewards_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/play-roblox-free-online_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_003_off00003ca8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3CA8 25288 bytes
SHA-256: 2b92e1a07d7f652352e9bc06c6ae73d30e58f320632f7de887a0fe192695241d
font_01_sfnt_off00007743.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7743 2884 bytes
SHA-256: 4d5450ce7e6d7db995ea7e6ffcd90efeba3e66825e548aa429b230fb003c0574
font_02_sfnt_off00008126.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8126 18228 bytes
SHA-256: 0912f0786cfda3eb3f4ec59ad0423aa1ca94e0fc281419103cd3a9ceac43c1d0

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