Malicious PDF — malware analysis report

Static analysis result for SHA-256 503af7befa30302f…

MALICIOUS

PDF

33.3 KB Created: 2021-06-29 19:35:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 6a21bcf7a937edb94ddd3ebe9d8c5218 SHA-1: 54b6ba85e9bab14c86520385acbb2a9bd961a529 SHA-256: 503af7befa30302f297851ce7a917eccb2a2a19efd9066373a9f208b1af0475c
122 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 0.9824

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.
  • Invisible PDF links to CAPTCHA-themed web lure high PDF_CAPTCHA_LINK_LURE
    PDF contains invisible clickable link annotations that point to a CAPTCHA/capcha-themed web path. This is a common phishing and ClickFix-style routing pattern: the PDF itself is inert, while the linked page performs the credential prompt or fake verification.
  • 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 http://netcdn.co/app/431946152/free-robux-2021-codes-withou-game-hack PDF link annotation
    • http://slims.abulyatama.ac.id//repository/minecraft-pe-free-ios_GM479516143.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/coin-master-free-coins-and-spins-online-tool_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/hacks-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/free-robux-generator-recaptcha_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/coin-master-game-legitimate-hack-without-signing-up-or-shareing_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/minecraft-116-free_GM479516143.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/hack-bloxtube-beta-roblox_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/what-tiktok-free-likes_GM835599320.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/robux-hack-no-download-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/how-do-you-robux-for-free_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/hack-coin-master-apk-32_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/how-to-hack-roblox-btools_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/roblox-jailbreak-cheats-2021_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/how-to-run-faster-in-roblox-hack-murder-mystery_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
font_00_sfnt_off00002aeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AEB 21740 bytes
SHA-256: 7851f1f04f1fab6d46e108e1e0e04e8a8d02cf7b7cf124d6b6e65c5c6806fc39
font_01_sfnt_off00005ac8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AC8 19880 bytes
SHA-256: a3a32758600eb034df5922f80e3557713d0ae5963068362fb8cd9e4545cf1f2a

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