Malicious PDF — malware analysis report

Static analysis result for SHA-256 b684ffca594ca938…

MALICIOUS

PDF

43.1 KB Created: 2021-05-17 20:05:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: b2402d63313e5ce579e51ef40005bf01 SHA-1: 15efaf26a23a676f87bb266158e466ca7bf635ec SHA-256: b684ffca594ca938eb62f222e109d8e374a45ac7e1f31aeb84a5f429ee55e1d8
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 0.9971

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/431946152/how-to-hack-a-roblox-account-easy-game-hack PDF link annotation
    • https://promotvsatelit.com/ckfinder/userfiles/files/mcpe-optifine_GM479516143.pdfIn PDF document text
    • https://promotvsatelit.com/ckfinder/userfiles/files/minecraft-pocket-apk_GM479516143.pdfIn PDF document text
    • https://promotvsatelit.com/ckfinder/userfiles/files/scaffold-minecraft-hack_GM479516143.pdfIn PDF document text
    • https://promotvsatelit.com/ckfinder/userfiles/files/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
    • https://promotvsatelit.com/ckfinder/userfiles/files/coin-master-daily-free-spins-link-download_GM406889139.pdfIn PDF document text
    • https://promotvsatelit.com/ckfinder/userfiles/files/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://promotvsatelit.com/ckfinder/userfiles/files/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://promotvsatelit.com/ckfinder/userfiles/files/coin-master-free-spins-link-download-hack_GM406889139.pdfIn PDF document text
    • https://promotvsatelit.com/ckfinder/userfiles/files/coin-master-reward-link-2021_GM406889139.pdfIn PDF document text
    • https://promotvsatelit.com/ckfinder/userfiles/files/roblox-top_GM431946152.pdfIn PDF document text
    • https://promotvsatelit.com/ckfinder/userfiles/files/coin-master-hack-uk_GM406889139.pdfIn PDF document text
    • https://promotvsatelit.com/ckfinder/userfiles/files/how-to-get-free-spins-on-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://promotvsatelit.com/ckfinder/userfiles/files/daily-coin-master_GM406889139.pdfIn PDF document text
    • https://promotvsatelit.com/ckfinder/userfiles/files/www-rubux_GM431946152.pdfIn PDF document text
    • https://promotvsatelit.com/ckfinder/userfiles/files/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • https://promotvsatelit.com/ckfinder/userfiles/files/how-to-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • https://promotvsatelit.com/ckfinder/userfiles/files/coin-master-hack-to-get-free-spins_GM406889139.pdfIn PDF document text
    • https://promotvsatelit.com/ckfinder/userfiles/files/hack-coin-master-for-iphone_GM406889139.pdfIn PDF document text
    • https://promotvsatelit.com/ckfinder/userfiles/files/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • https://promotvsatelit.com/ckfinder/userfiles/files/how-to-get-free-robux-2021_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
stream_003_off00004922.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4922 25584 bytes
SHA-256: 08bd7e14d47f7e678f846a37258aec96d18c4834df3f34a49e4e656cf059a57e
font_01_sfnt_off0000843c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x843C 18772 bytes
SHA-256: f0aa2a8f008262e8aa636f08cdffff7c9568ae6e0bf5f389be1472b9a6879674

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