Malicious PDF — malware analysis report

Static analysis result for SHA-256 eccde5351ae7fe7f…

MALICIOUS

PDF

42.6 KB Created: 2021-05-16 12:31:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 5326374259eeedf417573a38b1519f9c SHA-1: 7197212391b4f366d58e8069ad75cd4f6a467abf SHA-256: eccde5351ae7fe7f03cc446d17af01171b57fc2f37cdc161e360b9a328258204
200 Risk Score

Malware Insights

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

The PDF contains multiple links to redirectors and game hack generators, indicating a lure-based attack. The presence of a fake CAPTCHA heuristic suggests an attempt to trick the user into executing further actions, likely leading to a second-stage download. No scripts were extracted, but the embedded URLs and heuristics strongly suggest a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/431946152/roblox-mobile-hack-game-hack In PDF document text
    • http://ghhs.com.my/images/coin-master-gold-cards-free-2021_GM406889139.pdfIn PDF document text
    • http://ghhs.com.my/images/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://ghhs.com.my/images/coin-master-free-spins-link-today-hack_GM406889139.pdfIn PDF document text
    • http://ghhs.com.my/images/minecraft-tower-defense-hacked_GM479516143.pdfIn PDF document text
    • http://ghhs.com.my/images/free-robux-safe_GM431946152.pdfIn PDF document text
    • http://ghhs.com.my/images/hack-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://ghhs.com.my/images/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://ghhs.com.my/images/download-coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://ghhs.com.my/images/minecraft-hacks-115-2_GM479516143.pdfIn PDF document text
    • http://ghhs.com.my/images/coin-master-hack-mod-apk-android-1_GM406889139.pdfIn PDF document text
    • http://ghhs.com.my/images/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://ghhs.com.my/images/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://ghhs.com.my/images/how-to-change-your-name-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://ghhs.com.my/images/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • http://ghhs.com.my/images/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://ghhs.com.my/images/united-gaming-net-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://ghhs.com.my/images/coin-master-gold-cards-hack_GM406889139.pdfIn PDF document text
    • http://ghhs.com.my/images/free-robux-android_GM431946152.pdfIn PDF document text
    • http://ghhs.com.my/images/todays-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://ghhs.com.my/images/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • https://www.nrzroblox.comIn 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_off00004b1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B1D 25216 bytes
SHA-256: bd4f7811438f3e9505837523f1f175dc2be6d9f8b882511f7d3e8b3bfce15383
font_01_sfnt_off00008385.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8385 18500 bytes
SHA-256: e5e44b7d88d65c0aa39187413bdce35fa7eb26b841b7c8af9c826d312b99eefc

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