Malicious PDF — malware analysis report

Static analysis result for SHA-256 12c61de19e805f20…

MALICIOUS

PDF

34.2 KB Created: 2021-06-18 15:26:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 75e732f6082df992b840d8f8218a3f36 SHA-1: c835bf539686bee1d87ac81c43b424722beecc0f SHA-256: 12c61de19e805f20f0b5353cee0aa001eb4784635c8cb6c8ea7b0a6f9f8a38ec
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and cheats for popular games like Roblox and Coin Master. The ML classifier strongly flagged this PDF as malicious, and the presence of redirector links indicates a clear intent to lead users to potentially harmful content or further malware downloads. No scripts were extracted from this sample.

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.co/app/431946152/20219-walkspeed-roblox-cheat-game-hack In PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/roblox-strucid-hack-mac_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/try-minecraft-free_GM479516143.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/coin-master-hacks-for-free-spins_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/free-printable-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/coin-master-free-spins-app-android_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/hackeando-los-ordenadores-en-roblox-derank_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/stock-speed-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/8bp-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/free-spins-coin-master-november-2021_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/roblox-adopt-me-hack_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/coin-master-cheat-codes-free_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/robux-download_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/roblox-redeem-card-codes-free_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/roblox-g_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/free-free-robux_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/is-minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/robux-place-rewards_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_off00002d6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D6F 21936 bytes
SHA-256: 98973ae07b9b43b480963f99765fa58172c71c5f66b8fe69fee295b155e3c8f1
font_01_sfnt_off00005dd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DD9 19856 bytes
SHA-256: 3c2a6c4516c2254d64a673efeb2e028d60f82dbae0316573a1d44c6d12e60d93

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