Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca41771050b7445a…

MALICIOUS

PDF

44.0 KB Created: 2021-05-12 08:35:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 9657ca8462310b6955a0e15f523440ce SHA-1: 18ef0b7f93f96b517d32120607948619fb441c74 SHA-256: ca41771050b7445a7e150eaec21199e46a7c10e1ef721c956c52d25d1a6f15db
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 0.9969

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/coin-master-free-spins-link-2021-ios-game-hack PDF link annotation
    • https://mountainholidaytreks.com/userfiles/files/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/how-to-get-a-lot-of-robux_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/minecraft-wurst-hacked-client_GM479516143.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/roblox-hack-app_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/coin-master-hack-unlimited-spins_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/coin-master-online_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/get-free-robux-gg_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/games-like-minecraft-but-free_GM479516143.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-roblox-dominus_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/como-hack-coin-master_GM406889139.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_003_off00004b3a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B3A 30380 bytes
SHA-256: 2056978a816c063f9cdffc8f9be15b21e9ef9d66f6899c706955e538c4cb638b
font_01_sfnt_off000088f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88F4 18456 bytes
SHA-256: 405c435adaafa0da304b7a4986d8f56c56dc87ed278d5cff2ac0c57977d8d7e3

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