Malicious PDF — malware analysis report

Static analysis result for SHA-256 32cb77a46f0abf9d…

MALICIOUS

PDF

47.1 KB Created: 2021-05-11 02:47:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 524559fe82370bb1530257b57c24c3dd SHA-1: 3f084ff0a6a16b42a8c14d6512f47e2cf8bc28ef SHA-256: 32cb77a46f0abf9d4ed04249a188a2e230fe909fb93966a105e7f23c2f5d6228
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/406889139/how-to-earn-free-spin-in-coin-master-game-hack PDF link annotation
    • http://fmbompastor.com.br/images/free-roblox-clothes-boy_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/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/best-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://fmbompastor.com.br/images/hack-coin-master-dzooka_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/coin-master-free-coins-generator_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/spin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/earn-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/coin-master-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/coin-master-100-spin-slot_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/coin-master-mod-apk-free-download-for-android_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/play-roblox-free-online_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/coin-master-free-100-spin_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/roblox-skins-boy-free_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/hack-coin-master-ios-download_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/free-robux-apk_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/stock-speed-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/robux-generator-without-human-verification_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_off00004a18.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A18 30920 bytes
SHA-256: 97567ecede83956beb00a952d786582089315a8c44ce4408fe84206bd8922de6
font_01_sfnt_off00008c59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C59 2868 bytes
SHA-256: d2d857e2ddc1082c7667b23f2135a5c0ba26a2ff8b42c86c89c8e0b09aece855
font_02_sfnt_off00009643.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9643 18052 bytes
SHA-256: c8469be4e135a939fdcd4d5c4316a8d7a284a9925859706409da67ce72f50dba

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