Malicious PDF — malware analysis report

Static analysis result for SHA-256 e10423fca189943f…

MALICIOUS

PDF

42.3 KB Created: 2021-05-18 04:31:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c812e520d46a250b1fca502f0d33ae1b SHA-1: e1c0353a03ca1dbb11b02e379dfd5cd436116a63 SHA-256: e10423fca189943fa60521f588a20af10afbc903480a4877f5bb76becb81ef31
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting 'free Robux' and game hacks. The primary malicious URL identified is https://netcdn.xyz/app/431946152/free-robux-no-verification-required-game-hack. The document body and embedded links are designed to trick users into clicking through to potentially harmful sites, aligning with a phishing or scamming attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/431946152/free-robux-no-verification-required-game-hack In PDF document text
    • http://tehergumi.hu/images/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://tehergumi.hu/images/free-roblox-boy-hair_GM431946152.pdfIn PDF document text
    • http://tehergumi.hu/images/coin-master-hack-tool-v1-9-apk_GM406889139.pdfIn PDF document text
    • http://tehergumi.hu/images/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://tehergumi.hu/images/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://tehergumi.hu/images/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://tehergumi.hu/images/game-hunters-coin-master_GM406889139.pdfIn PDF document text
    • http://tehergumi.hu/images/minecraft-download-free-download_GM479516143.pdfIn PDF document text
    • http://tehergumi.hu/images/como-hackear-coin-master-gratis_GM406889139.pdfIn PDF document text
    • http://tehergumi.hu/images/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://tehergumi.hu/images/earn-robux-today_GM431946152.pdfIn PDF document text
    • http://tehergumi.hu/images/coin-master-hack-here_GM406889139.pdfIn PDF document text
    • http://tehergumi.hu/images/how-to-get-minecraft-on-chromebook-for-free_GM479516143.pdfIn PDF document text
    • http://tehergumi.hu/images/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://tehergumi.hu/images/minecraft-dungeons-free-download-pc_GM479516143.pdfIn PDF document text
    • http://tehergumi.hu/images/coin-master-hack-tool-access-online-generator_GM406889139.pdfIn PDF document text
    • http://tehergumi.hu/images/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://tehergumi.hu/images/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://tehergumi.hu/images/moonactive-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://tehergumi.hu/images/coin-master-jackpot-hack_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_off000048db.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48DB 24332 bytes
SHA-256: de5c4a4bdf7efa015560d6b1471e22ed9aee37a1ffa42d1b49e18c39995613f1
font_01_sfnt_off000080e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80E8 18944 bytes
SHA-256: 3e075e77f873d88a985ea69ac7fafb934745d76ebabdb09bc56e33f005972947

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