Malicious PDF — malware analysis report

Static analysis result for SHA-256 05ea50410f9855aa…

MALICIOUS

PDF

43.5 KB Created: 2021-05-14 05:03:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7727a518d87e4d5fdb81dad7cee54eac SHA-1: 9ab763247c4c009b7a18442f7c701ff7089f967f SHA-256: 05ea50410f9855aa95769b22cdc9e9d8be52d998abebe473e42cbcb6f5cf86fa
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 0.9969

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-people-in-roblox-game-hack PDF link annotation
    • http://www.alsultantrading.ae/userfiles/files/coin-master-daily-link_GM406889139.pdfIn PDF document text
    • http://www.alsultantrading.ae/userfiles/files/how-to-change-your-username-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.alsultantrading.ae/userfiles/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://www.alsultantrading.ae/userfiles/files/coin-master-free-spins-today-39_GM406889139.pdfIn PDF document text
    • http://www.alsultantrading.ae/userfiles/files/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://www.alsultantrading.ae/userfiles/files/hacks-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://www.alsultantrading.ae/userfiles/files/coin-master-codes_GM406889139.pdfIn PDF document text
    • http://www.alsultantrading.ae/userfiles/files/coin-master-hack-programmers_GM406889139.pdfIn PDF document text
    • http://www.alsultantrading.ae/userfiles/files/roblox-scam_GM431946152.pdfIn PDF document text
    • http://www.alsultantrading.ae/userfiles/files/free-roblox-generator_GM431946152.pdfIn PDF document text
    • http://www.alsultantrading.ae/userfiles/files/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.alsultantrading.ae/userfiles/files/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://www.alsultantrading.ae/userfiles/files/coin-master-free-spins-hack-link_GM406889139.pdfIn PDF document text
    • http://www.alsultantrading.ae/userfiles/files/roblox-free-hats_GM431946152.pdfIn PDF document text
    • http://www.alsultantrading.ae/userfiles/files/coin-master-cheats-without-verification_GM406889139.pdfIn PDF document text
    • http://www.alsultantrading.ae/userfiles/files/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.alsultantrading.ae/userfiles/files/how-to-hack-roblox-on-mobile_GM431946152.pdfIn PDF document text
    • http://www.alsultantrading.ae/userfiles/files/free-robux-games_GM431946152.pdfIn PDF document text
    • http://www.alsultantrading.ae/userfiles/files/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • http://www.alsultantrading.ae/userfiles/files/how-to-get-free-gold-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_off00004bb1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BB1 26008 bytes
SHA-256: 17bd3e7f742ca540a3372e03c72dedf185125f12218f96ec104f134fc6ec6490
font_01_sfnt_off00008677.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8677 18676 bytes
SHA-256: 10ff19610ec10ba06ce370fdc76468137d93ed174f58c2f80433e0d310d8c060

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