Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9323de02e3736c6…

MALICIOUS

PDF

48.1 KB Created: 2021-06-07 08:29:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 44d717377319cc8712f234a246fb5072 SHA-1: 7a9fc16a73925f3e8c3fde94931d60eaa39ed1b1 SHA-256: e9323de02e3736c66df1d7d943b68f57deee4fbe9e69eed558971706f597b249
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to redirector infrastructure, masquerading as game hacks and impersonating Microsoft. The primary link, https://netcdn.tw/app/431946152/how-to-hack-roblox-game-2021-game-hack, is identified as a malicious redirector. The document's content and structure strongly suggest an attempt to lure users into clicking these links, likely for credential harvesting or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 5

  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.tw/app/431946152/how-to-hack-roblox-game-2021-game-hack.
  • 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.tw/app/431946152/how-to-hack-roblox-game-2021-game-hack In PDF document text
    • https://serviceaccctvjogja.com/ckfinder/userfiles/files/hacks-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • https://serviceaccctvjogja.com/ckfinder/userfiles/files/how-to-get-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • https://serviceaccctvjogja.com/ckfinder/userfiles/files/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • https://serviceaccctvjogja.com/ckfinder/userfiles/files/games-for-robux_GM431946152.pdfIn PDF document text
    • https://serviceaccctvjogja.com/ckfinder/userfiles/files/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://serviceaccctvjogja.com/ckfinder/userfiles/files/play-coin-master_GM406889139.pdfIn PDF document text
    • https://serviceaccctvjogja.com/ckfinder/userfiles/files/free-coin-master-game_GM406889139.pdfIn PDF document text
    • https://serviceaccctvjogja.com/ckfinder/userfiles/files/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • https://serviceaccctvjogja.com/ckfinder/userfiles/files/roblox-old-avatar_GM431946152.pdfIn PDF document text
    • https://serviceaccctvjogja.com/ckfinder/userfiles/files/can-you-get-free-tiktok-fans_GM835599320.pdfIn PDF document text
    • https://serviceaccctvjogja.com/ckfinder/userfiles/files/roblox-microsoft-rewards_GM431946152.pdfIn PDF document text
    • https://serviceaccctvjogja.com/ckfinder/userfiles/files/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://serviceaccctvjogja.com/ckfinder/userfiles/files/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://serviceaccctvjogja.com/ckfinder/userfiles/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://serviceaccctvjogja.com/ckfinder/userfiles/files/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://serviceaccctvjogja.com/ckfinder/userfiles/files/coin-master-real-hack_GM406889139.pdfIn PDF document text
    • https://serviceaccctvjogja.com/ckfinder/userfiles/files/robux-boost_GM431946152.pdfIn PDF document text
    • https://serviceaccctvjogja.com/ckfinder/userfiles/files/robuxglobalcom_GM431946152.pdfIn PDF document text
    • https://serviceaccctvjogja.com/ckfinder/userfiles/files/coinmasterfree_GM406889139.pdfIn PDF document text
    • https://serviceaccctvjogja.com/ckfinder/userfiles/files/coin-master-hack-app-for-ios_GM406889139.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_off000051a1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51A1 25584 bytes
SHA-256: 04497f69740a17422767c70084c38912f4ea57080140cc12f3a4f182b2a72a85
font_01_sfnt_off00008ce1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CE1 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off000096cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96CC 19008 bytes
SHA-256: 4052a4329353dfd8f825a184313827dcb7d28579bd23effd71864e96ef06b38c