Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d43c998330c0f71…

MALICIOUS

PDF

35.3 KB Created: 2021-07-03 18:21:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 251425962e14208ef361784fa6836260 SHA-1: bbb9a493146238dc096d5803df057398c1cad3ab SHA-256: 4d43c998330c0f71a591a7a6efa3c518315d3df3ee6a173a93a155696639ffd6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links and document body text that promise free game currency or hacks, specifically mentioning 'Robux' and 'Coin Master'. These links redirect to a known malicious infrastructure. The primary lure is to trick users into clicking these links, likely leading to further malware downloads or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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.tw/app/431946152/how-to-hack-free-robux-no-human-verification-game-hack In PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-hack-version-apk-download_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/rare-free-links-to-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/quel-touche-faire-pour-avoir-lz-free-code-dans-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/comment-hacker-roblox-accesoir_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-hack-com-login_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-foxy-food-coin-master_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/descargar-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-adopt-me-hacks-2021_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-blood-moon-tycoon-hack_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/get-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/are-any-roblox-games-free_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/robux-kingsml-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/games-that-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/oprewards-com-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/robux-com-free_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/i-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/cerberus-cheats-roblox_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
font_00_sfnt_off000030d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30D8 22816 bytes
SHA-256: 4351ed84a2700818cf00ada6b949c110be3d2984ba3573218dd2548a0dca5f1e
font_01_sfnt_off000063dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63DC 19480 bytes
SHA-256: 0299505c83e333d52e974e8c4e8e679ad549c8cc7b40710004f6f561e95ac096

Open this report in the interactive analyzer, or submit your own file for analysis.