Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4653e29c33e127e…

MALICIOUS

PDF

45.4 KB Created: 2021-06-02 20:22:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 303d259b24525370e785fcaf7b9cc2ef SHA-1: aeb972a5671fef787cb57c2dc4ba48c001c9761f SHA-256: b4653e29c33e127e0898ed8f03ecb35204efc0e74f260054fc57ba0104e2c19f
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. 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 0.9864

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/hack-mods-roblox-game-hack PDF link annotation
    • http://loriginedupain.org/images/free-minecraft-pe-server_GM479516143.pdfIn PDF document text
    • http://loriginedupain.org/images/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://loriginedupain.org/images/minecraft-free-download-unblocked_GM479516143.pdfIn PDF document text
    • http://loriginedupain.org/images/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://loriginedupain.org/images/coin-master-34-4-hack-download_GM406889139.pdfIn PDF document text
    • http://loriginedupain.org/images/minecraft-realms-free-codes_GM479516143.pdfIn PDF document text
    • http://loriginedupain.org/images/free-minecraft-domain_GM479516143.pdfIn PDF document text
    • http://loriginedupain.org/images/robux-free-com_GM431946152.pdfIn PDF document text
    • http://loriginedupain.org/images/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://loriginedupain.org/images/hacks-to-get-money-on-roblox-adopt-me_GM431946152.pdfIn PDF document text
    • http://loriginedupain.org/images/free-tiktok-likes_GM835599320.pdfIn PDF document text
    • http://loriginedupain.org/images/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://loriginedupain.org/images/how-to-get-minecraft-for-free-on-ps4_GM479516143.pdfIn PDF document text
    • http://loriginedupain.org/images/minecraft-pe-hacks-ios_GM479516143.pdfIn PDF document text
    • http://loriginedupain.org/images/how-to-get-free-tiktok-fans_GM835599320.pdfIn PDF document text
    • http://loriginedupain.org/images/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://loriginedupain.org/images/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://loriginedupain.org/images/wizard-hacks_GM479516143.pdfIn PDF document text
    • http://loriginedupain.org/images/50-free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://loriginedupain.org/images/hacks-for-minecraft-bedrock_GM479516143.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_004_off0000504f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x504F 26296 bytes
SHA-256: 567e948f8c7152bb09c6c0a39b1d46cac147a9dd3b000694db278dd61ce81abb
font_01_sfnt_off00008df0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DF0 18552 bytes
SHA-256: 5667bc240ce9aab4d42557ac9e2e8d0768550553bf8af97744537f2bf8112f95

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