Malicious PDF — malware analysis report

Static analysis result for SHA-256 27f4937fea7fe040…

MALICIOUS

PDF

45.1 KB Created: 2021-05-15 08:10:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 9b7cd5c6cc588c2513babcf400660266 SHA-1: 854c0587a4b273aef6eb7fae87e060c8a0885fb2 SHA-256: 27f4937fea7fe04050d6e343e08876da0d658cb15f6a4f295bf19de96b4fc6dd
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 0.9621

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/431946152/how-to-get-free-robux-in-2021-game-hack PDF link annotation
    • http://halal-center.ru/images/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • http://halal-center.ru/images/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://halal-center.ru/images/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://halal-center.ru/images/coin-master-rewards-app_GM406889139.pdfIn PDF document text
    • http://halal-center.ru/images/can-you-give-me-robux_GM431946152.pdfIn PDF document text
    • http://halal-center.ru/images/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
    • http://halal-center.ru/images/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • http://halal-center.ru/images/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://halal-center.ru/images/coin-master-hack-app-ios_GM406889139.pdfIn PDF document text
    • http://halal-center.ru/images/free-minecraft-mods-for-xbox-one_GM479516143.pdfIn PDF document text
    • http://halal-center.ru/images/free-roblox-clothes-2021_GM431946152.pdfIn PDF document text
    • http://halal-center.ru/images/minecraft-hacked-client-18_GM479516143.pdfIn PDF document text
    • http://halal-center.ru/images/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://halal-center.ru/images/free-coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • http://halal-center.ru/images/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://halal-center.ru/images/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://halal-center.ru/images/free-roblox-scripts_GM431946152.pdfIn PDF document text
    • http://halal-center.ru/images/www-free-robux-com_GM431946152.pdfIn PDF document text
    • http://halal-center.ru/images/robux-page_GM431946152.pdfIn PDF document text
    • http://halal-center.ru/images/working-coin-master-hack_GM406889139.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
font_00_sfnt_off00004b5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B5E 24580 bytes
SHA-256: 6a4a509caf2380efe08d1eeb0ba0df7492ca07ce2a3f36442cce9a9c81d5e45e
font_01_sfnt_off000082bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82BF 2836 bytes
SHA-256: fd98c8f6e7c2e74bbd5822409159a93ac5c94da083ae4c2eb269d4284375f9e8
font_02_sfnt_off00008c65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C65 18684 bytes
SHA-256: 824acc3fee39cc83a95b513dc81155ec57b17e0207e8ef2cc186232f9d88d4f0

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