Malicious PDF — malware analysis report

Static analysis result for SHA-256 872557140999dd4a…

MALICIOUS

PDF

42.2 KB Created: 2021-05-12 11:31:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 368acbfa0c685709076b576b8448844e SHA-1: 543be4e9f223a0af8a1bd6b22a652e964a858298 SHA-256: 872557140999dd4a594a78be65152f89fb2f7da8fa00daa528b995687cc8eed7
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous links to external websites that promise game hacks and generators, a common lure for users. The heuristic 'SE_FAKE_CAPTCHA' indicates the document may display a fake CAPTCHA to trick users into executing commands or interacting further. The presence of embedded URLs and the ML classifier's high confidence score suggest a malicious intent to redirect users to potentially harmful content or download second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/406889139/free-coin-master-game-game-hack PDF link annotation
    • http://mtsn-baranti.com/perpus/repository/coin-master-download_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/roblox-tracker_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/oprewards-points-generator_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/coin-master-cheat-engine-hack_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/how-to-get-robux-fast_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/como-sacar-buen-puntaje-en-juego-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/free-promo-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/minecraft-bedrock-edition-pc-download-free_GM479516143.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/coin-master-70-spin-link-2021_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/coin-master-20-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/coin-master-100-spin-slot_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/20210-free-spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/free-spins-from-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_off00004cdf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CDF 24368 bytes
SHA-256: 2d7cc198249ff33144bce75117016a07b6b630510dad017d755ff92c3c10e5e9
font_01_sfnt_off000083b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83B8 17968 bytes
SHA-256: 26c9c4b875abe90d5a203e632a25aafef6162dffda8186c61deacbdf7b71a521

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