Malicious PDF — malware analysis report

Static analysis result for SHA-256 05468f8d95606824…

MALICIOUS

PDF

45.7 KB Created: 2021-06-07 17:27:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 7037ae6595d9ad0d614f844d20d3fe34 SHA-1: c96c53066fb4ccefafa6c5c51c24745b86f965e8 SHA-256: 05468f8d9560682492fb2ea49a651cf2b493cc918e9b3fe98e54b8d7cd23a434
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a common lure, presenting itself as a 'Roblox Hack' or 'game generator' to trick users into clicking malicious links. The document displays a fake CAPTCHA or verification prompt, which is a tactic to coerce users into interacting with the content. The primary malicious link identified is https://netcdn.tw/app/431946152/roblox-hack-set-robux-2021-game-hack, which likely leads to further malicious content or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/roblox-hack-set-robux-2021-game-hack In PDF document text
    • http://omahahospitalityhalloffame.org/images/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://omahahospitalityhalloffame.org/images/how-to-make-a-private-server-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://omahahospitalityhalloffame.org/images/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://omahahospitalityhalloffame.org/images/how-to-get-minecraft-for-free-on-ps4_GM479516143.pdfIn PDF document text
    • http://omahahospitalityhalloffame.org/images/master-coin-hack-apk_GM406889139.pdfIn PDF document text
    • http://omahahospitalityhalloffame.org/images/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • http://omahahospitalityhalloffame.org/images/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://omahahospitalityhalloffame.org/images/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://omahahospitalityhalloffame.org/images/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://omahahospitalityhalloffame.org/images/roblox-free-roblox_GM431946152.pdfIn PDF document text
    • http://omahahospitalityhalloffame.org/images/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://omahahospitalityhalloffame.org/images/coin-master-hack-tool-pc-download_GM406889139.pdfIn PDF document text
    • http://omahahospitalityhalloffame.org/images/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://omahahospitalityhalloffame.org/images/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://omahahospitalityhalloffame.org/images/roblox-nike-free_GM431946152.pdfIn PDF document text
    • http://omahahospitalityhalloffame.org/images/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • http://omahahospitalityhalloffame.org/images/how-to-play-minecraft-with-friends-for-free_GM479516143.pdfIn PDF document text
    • http://omahahospitalityhalloffame.org/images/coin-master-support_GM406889139.pdfIn PDF document text
    • http://omahahospitalityhalloffame.org/images/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • http://omahahospitalityhalloffame.org/images/websites-to-get-free-robux_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_004_off00005201.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5201 26072 bytes
SHA-256: 23ef25c16e5054ae2bf4940d31c1c3ccdbf2e14360bed2f19f9e5667c3442a54
font_01_sfnt_off00008e2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E2C 18828 bytes
SHA-256: 2ef256062d032c5d13ac194597e2397ffc1dd55f6903796f3ca4fd40de996360

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