Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f87475cc6d80f03…

MALICIOUS

PDF

43.3 KB Created: 2021-05-11 01:14:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a556b30165fcce6ad6e61d85a2bff46c SHA-1: 175e442673fddb789c07d96f1bafd4192e248925 SHA-256: 2f87475cc6d80f0348ad2e27766b0c8fd43c287b41c8e68924947d58b34f624c
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 0.9969

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/roblox-free-wings-game-hack PDF link annotation
    • http://autismoalbacete.org/images/simplysarc_GM479516143.pdfIn PDF document text
    • http://autismoalbacete.org/images/minecraft-bedrock-client_GM479516143.pdfIn PDF document text
    • http://autismoalbacete.org/images/minecraft-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • http://autismoalbacete.org/images/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://autismoalbacete.org/images/free-minecraft-realm-codes_GM479516143.pdfIn PDF document text
    • http://autismoalbacete.org/images/daily-free-spin-link-in-coin-master_GM406889139.pdfIn PDF document text
    • http://autismoalbacete.org/images/roblox-avatar-girl_GM431946152.pdfIn PDF document text
    • http://autismoalbacete.org/images/coin-master-hack-apk-download-for-android_GM406889139.pdfIn PDF document text
    • http://autismoalbacete.org/images/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://autismoalbacete.org/images/free-coin-master-spins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://autismoalbacete.org/images/coin-master-reward-link-2021_GM406889139.pdfIn PDF document text
    • http://autismoalbacete.org/images/minecraft-items_GM479516143.pdfIn PDF document text
    • http://autismoalbacete.org/images/coin-master-free-spins-twitter_GM406889139.pdfIn PDF document text
    • http://autismoalbacete.org/images/how-to-really-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://autismoalbacete.org/images/coin-master-hack-app-link_GM406889139.pdfIn PDF document text
    • http://autismoalbacete.org/images/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • http://autismoalbacete.org/images/coin-master-promo-code-2021_GM406889139.pdfIn PDF document text
    • http://autismoalbacete.org/images/free-spins-on-coin-master-app_GM406889139.pdfIn PDF document text
    • http://autismoalbacete.org/images/how-many-levels-in-coin-master_GM406889139.pdfIn PDF document text
    • http://autismoalbacete.org/images/free-robux-generator-2021-no-human-verification-or-survey_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
font_00_sfnt_off00004897.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4897 27068 bytes
SHA-256: 96b9eb50c6b829ceead27baf90422d94ea820514bd0c5eebf060456c59547683
font_01_sfnt_off0000861f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x861F 18556 bytes
SHA-256: 0c6b1e6d5af6e71a5f717763afec74d9fa5a47fcdd63102494205ccdca690211

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