Malicious PDF — malware analysis report

Static analysis result for SHA-256 ada2eb638132fcc7…

MALICIOUS

PDF

46.3 KB Created: 2021-06-09 10:18:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3aaa3cdeff874ddb34b4ff945f0b400b SHA-1: fe0d5fe7fd5eb3dd60d9c022acc9e0f82cece158 SHA-256: ada2eb638132fcc7360ade5c48b82cd0f2142ec87f0ec800eda44ed6e4fad676
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 free currency. The primary malicious URL identified is https://netcdn.tw/app/431946152/how-to-hack-roblox-games-easy-game-hack. This lure is designed to trick users into clicking through to potentially harmful content, likely as part of a phishing or scam campaign. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.tw/app/431946152/how-to-hack-roblox-games-easy-game-hack In PDF document text
    • http://www.sepl.net.au/uploaded_files/userfiles/files/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://www.sepl.net.au/uploaded_files/userfiles/files/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.sepl.net.au/uploaded_files/userfiles/files/free-minecraft-alts_GM479516143.pdfIn PDF document text
    • http://www.sepl.net.au/uploaded_files/userfiles/files/free-coins-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://www.sepl.net.au/uploaded_files/userfiles/files/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • http://www.sepl.net.au/uploaded_files/userfiles/files/how-to-get-20210-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.sepl.net.au/uploaded_files/userfiles/files/my-robux_GM431946152.pdfIn PDF document text
    • http://www.sepl.net.au/uploaded_files/userfiles/files/coin-master-hack-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://www.sepl.net.au/uploaded_files/userfiles/files/free-100-robux_GM431946152.pdfIn PDF document text
    • http://www.sepl.net.au/uploaded_files/userfiles/files/master-coin-hack-apk_GM406889139.pdfIn PDF document text
    • http://www.sepl.net.au/uploaded_files/userfiles/files/roblox-com-redeem_GM431946152.pdfIn PDF document text
    • http://www.sepl.net.au/uploaded_files/userfiles/files/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • http://www.sepl.net.au/uploaded_files/userfiles/files/minecraft-windows-10-edition-free-download_GM479516143.pdfIn PDF document text
    • http://www.sepl.net.au/uploaded_files/userfiles/files/coin-master-free-cards-and-spin-link_GM406889139.pdfIn PDF document text
    • http://www.sepl.net.au/uploaded_files/userfiles/files/robux-free-online_GM431946152.pdfIn PDF document text
    • http://www.sepl.net.au/uploaded_files/userfiles/files/coin-master-hack-version-ios_GM406889139.pdfIn PDF document text
    • http://www.sepl.net.au/uploaded_files/userfiles/files/coin-master-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • http://www.sepl.net.au/uploaded_files/userfiles/files/free-spin-coin-master-new-link_GM406889139.pdfIn PDF document text
    • http://www.sepl.net.au/uploaded_files/userfiles/files/free-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://www.sepl.net.au/uploaded_files/userfiles/files/how-to-get-free-robux-codes_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
stream_004_off00005528.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5528 25856 bytes
SHA-256: ef762a10f4ca676fde8880e7dc5f28745d8cedf28d6be9acd29520131a5722ec
font_01_sfnt_off000090f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90F7 18784 bytes
SHA-256: d273b82ad9f351bd151094a3cf505ed22bbe66ea961ff1327baa7f6f919d4748

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