Malicious PDF — malware analysis report

Static analysis result for SHA-256 6631cabe2125f5fc…

MALICIOUS

PDF

34.3 KB Created: 2021-07-09 04:49:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d38385a8acc9bcfab297a6c08971ea55 SHA-1: 75666bd085a3da4823e719770ba7933080bc75cf SHA-256: 6631cabe2125f5fc33cd4b031ded3a677fd738fd93f439ae61c5e9d3f4148250
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 advertising free game hacks and generators. The primary lure URL is http://netcdn.tw/app/479516143/minecraft-skins-download-free-game-hack, which is flagged as a known malicious redirector. The document body and heuristics indicate a social engineering tactic 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/479516143/minecraft-skins-download-free-game-hack In PDF document text
    • https://www.ocic.hr/files/how-many-villages-are-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.ocic.hr/files/free-roblox-premium_GM431946152.pdfIn PDF document text
    • http://www.ocic.hr/files/hack-injector-for-roblox_GM431946152.pdfIn PDF document text
    • http://www.ocic.hr/files/roblox-lovenet_GM431946152.pdfIn PDF document text
    • http://www.ocic.hr/files/coin-master-free-spins-glitch_GM406889139.pdfIn PDF document text
    • http://www.ocic.hr/files/how-to-get-free-spins-in-shinobi-life-roblox-125_GM431946152.pdfIn PDF document text
    • http://www.ocic.hr/files/free-headless-head-roblox_GM431946152.pdfIn PDF document text
    • http://www.ocic.hr/files/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.ocic.hr/files/free-minecraft-bedrock-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • https://www.ocic.hr/files/free-robux-site_GM431946152.pdfIn PDF document text
    • http://www.ocic.hr/files/roblox-money-cheats-2021_GM431946152.pdfIn PDF document text
    • http://www.ocic.hr/files/minecraft-free-version_GM479516143.pdfIn PDF document text
    • https://www.ocic.hr/files/old-roblox-accounts-for-free_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/building-simulator-hack-roblox_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.ocic.hr/files/roblox-free-wings_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/how-to-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://www.ocic.hr/files/get-free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • http://www.ocic.hr/files/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://www.ocic.hr/files/minecraft-build-hacks_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_off0000300d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x300D 22396 bytes
SHA-256: 037e945c8c528a0ee3af8111a24d9003b04d7789d6f747997bb0370fb30db6c1
font_01_sfnt_off000061f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61F4 18748 bytes
SHA-256: caac3017402713390db328034182a8378ae11b4318c04c7e478aff4389fa23cd

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