Malicious PDF — malware analysis report

Static analysis result for SHA-256 e17818d5aeffd05a…

MALICIOUS

PDF

47.1 KB Created: 2021-05-11 07:34:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 58bafb723b5579e8a01a1551fbef4777 SHA-1: 880919db46776143be23ac2c853bd3b538687cb0 SHA-256: e17818d5aeffd05ad21228be1b8f9bef766cfbb579bd3e0476acf4c23b3fbf91
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 0.9977

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/free-robux-websites-that-actually-work-game-hack PDF link annotation
    • http://gitagasht.com/images/cm-spin-link_GM406889139.pdfIn PDF document text
    • http://gitagasht.com/images/free-printable-roblox-coloring-pages_GM431946152.pdfIn PDF document text
    • http://gitagasht.com/images/free-script-executor-roblox_GM431946152.pdfIn PDF document text
    • http://gitagasht.com/images/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://gitagasht.com/images/pixies-gigantic-coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://gitagasht.com/images/redeem-roblox-card-free_GM431946152.pdfIn PDF document text
    • http://gitagasht.com/images/coin-master-free-spins-fb-champion_GM406889139.pdfIn PDF document text
    • http://gitagasht.com/images/free-robux-master_GM431946152.pdfIn PDF document text
    • http://gitagasht.com/images/coin-master-free-spin-redeem-code_GM406889139.pdfIn PDF document text
    • http://gitagasht.com/images/how-to-get-minecraft-for-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • http://gitagasht.com/images/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://gitagasht.com/images/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://gitagasht.com/images/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://gitagasht.com/images/free-spins-on-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://gitagasht.com/images/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://gitagasht.com/images/roblox40com-robux_GM431946152.pdfIn PDF document text
    • http://gitagasht.com/images/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://gitagasht.com/images/free-robux-exe_GM431946152.pdfIn PDF document text
    • http://gitagasht.com/images/how-to-hack-someones-minecraft-account_GM479516143.pdfIn PDF document text
    • http://gitagasht.com/images/how-to-get-free-cards-on-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_off000047c4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47C4 34180 bytes
SHA-256: eb2f2a7f71e7e3a66f2509e780b66357e388488842992f4a297355127ff96f7d
font_01_sfnt_off0000937a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x937A 19252 bytes
SHA-256: f49525d2cb353299e95430044cca9c62699809686ebb763340304ea0e82a2cbb

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