Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b6cdaab03f15b6e…

MALICIOUS

PDF

50.0 KB Created: 2021-06-13 14:56:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e6c77f9a17a13168369709ab681106ce SHA-1: eb2250c1e317d5099dc0aeda23b6cf3365e6653b SHA-256: 9b6cdaab03f15b6e55fafc31ca313a682b736ce98f866e77df4661bb522707b5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to malicious infrastructure, masquerading as game hacks or generators. The primary lure URL is http://netcdn.co/app/431946152/instal-roblox-free-and-easy-download-game-hack. 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 0.9796

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/instal-roblox-free-and-easy-download-game-hack In PDF document text
    • https://wald-match.com.tw/upload/files/hack-coin-master-no-verification_GM406889139.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/como-ser-pro-20-en-roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/minecraft-dungeons-free-download_GM479516143.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/coin-master-hack-apk-2021_GM406889139.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/coin-master-daily-free-rewards_GM406889139.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/hack-coin-master-for-free_GM406889139.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/minecraft-realms-free-codes_GM479516143.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/is-roblox-free-on-ps4_GM431946152.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/microsoft-rewards-free-robux_GM431946152.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/multiplayer-master-hack-coins_GM406889139.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/how-to-get-free-tiktok-coins_GM835599320.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/free-minecraft-account-list_GM479516143.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005562.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5562 27132 bytes
SHA-256: 8fa6f7995dacb8a687885dda620d0656de5c3c38dba815bc9adfa834328d6675
font_01_sfnt_off00009471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9471 2816 bytes
SHA-256: 4555740682277f0055d57b15bd0ba953e5b51415ea3d21c93db391eace072d4f
font_02_sfnt_off00009e82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E82 18964 bytes
SHA-256: cf87d8680d2f46103ead8adaa6fa94fed1174898d5a510f43855e31660371cb3

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