Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5a05c24ad3c6e2c…

MALICIOUS

PDF

47.6 KB Created: 2021-06-10 23:19:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: b6612ee7731e40563e3cfbdbaeed46cd SHA-1: 80583900ba2548bbd1a2f54a92014e9708ff6947 SHA-256: b5a05c24ad3c6e2c3ef325fb5b7abda029b13182e883d856c41c6ea2f4a7b641
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a fake CAPTCHA lure designed to trick users into interacting with malicious links. The primary link points to a site offering game hacks, which is a common social engineering tactic. The document also contains numerous other URLs, likely part of a broader phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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.tw/app/431946152/hack-roblox-apk-mobil-game-hack PDF link annotation
    • http://reggieslockandkey.com/images/free-tiktok-likes_GM835599320.pdfIn PDF document text
    • http://reggieslockandkey.com/images/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdfIn PDF document text
    • https://reggieslockandkey.com/images/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/free-robux-site_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/roblox-free-models_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/free-roblox-injectorscom_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/free-unlimited-coin-master-400-spin-link_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • https://reggieslockandkey.com/images/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/roblox-giftcard-code-free_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/minecraft-for-chromebook-free_GM479516143.pdfIn PDF document text
    • https://reggieslockandkey.com/images/freerobux-co_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/coin-master-hack-version-download-2021-android_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/can-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://reggieslockandkey.com/images/how-to-get-free-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/roblox-vehicle-tycoon-free-money-script-pastebin_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000521a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x521A 24676 bytes
SHA-256: cd9a6ab26b33c30e3429b63acb2d7f36e048cdf5d9f5d1499491d1cb69dfd7c3
font_01_sfnt_off00008abb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ABB 3400 bytes
SHA-256: 4b3e0f36ad1e0c7e3ea5c178fd2b4f097d1e01575fc6a4101a8b520db34dfe07
font_02_sfnt_off000095e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95E5 18672 bytes
SHA-256: 2b24fe899213538048b6f405bc559fe4b129db747abb3d1ceadcec6f2318674d

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