Malicious PDF — malware analysis report

Static analysis result for SHA-256 5096766c2d0f259b…

MALICIOUS

PDF

34.0 KB Created: 2021-06-30 23:47:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 1a8e0adcd7941426c822da505e61cac6 SHA-1: c1d8b114e04403222c44780ddd03902d8e819653 SHA-256: 5096766c2d0f259b391ebeca7d092cc6a7e25cc0a689394b776eb46752e6da33
200 Risk Score

Malware Insights

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

This PDF document employs a fake CAPTCHA lure to trick users into interacting with malicious links, specifically targeting those seeking game-related cheats or generators. The document contains numerous embedded URLs, with http://netcdn.co/app/431946152/hacker-names-for-roblox-game-hack identified as a known malicious redirector. While no scripts were explicitly extracted, the PDF structure and the nature of the lures suggest potential for client-side exploitation or redirection to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/hacker-names-for-roblox-game-hack In PDF document text
    • http://library.gkigadingserpong.org/repository/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-open-the-roblox-hack-menu_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-hack-free-robux-generator-phantom-forces-hack-android_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/rocitizens-roblox-cheat-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-do-you-get-free-pet-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/http-roblox-hack-mobile-generator-net_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/bloxawards-com-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-coins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/easy-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-roblox-code-giveaways_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-codes-to-get-free-stuff_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-using-codes_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-minecraft-server-maker_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/hacks-da-hood-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/hack-coin-master-game-apk-download_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/minecraft-hack-download_GM479516143.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_off00002fd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FD1 21800 bytes
SHA-256: 5163405a0cfc6bd474f7210c85ffcb07498eb3acf343d10483abf106175834b0
font_01_sfnt_off00005fcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FCB 19080 bytes
SHA-256: 5759a4444ce8af4bd3894dda3a98270ee729d7fce913cdbbc352f6b96442b887

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