Malicious PDF — malware analysis report

Static analysis result for SHA-256 e26c6fc0cd12f539…

MALICIOUS

PDF

35.2 KB Created: 2021-07-04 21:09:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 91fb94f7ec8f4b0f5d143a0171318bbe SHA-1: 4e5819d1ebd14c66077c7044f6a4d1625dc82246 SHA-256: e26c6fc0cd12f5391f6ab22773f6badac3cbdd5132c28392e42e569f517e2792
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with one prominent link pointing to 'netcdn.tw' and related to game hacking tools. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs suggests an attempt to redirect the user to malicious content. While no scripts were explicitly extracted, the document's structure and content indicate a phishing or scam attempt.

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/406889139/can-lucky-patcher-hack-coin-master-game-hack In PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/how-to-2021-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/www-rubux_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-free-coin-hack_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/redeem-robux-hack_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/free-robux-trade_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/real-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/minecraft-hacked-client-bedrock_GM479516143.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/inf-health-script-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/vip-roblox-free_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/oprewards-com-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/eating-simulator-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/i-was-hacked-by-liepa20212021910-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/roblox-highschool-how-to-get-free-gear_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-hack-for-ios_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/copy-and-paste-for-free-roblox-clothes_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/kron-hack-for-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/how-to-wall-hack-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/how-to-get-robux-easy_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/free-robux-no-anti-bot-verification_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_002_off00003228.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3228 23020 bytes
SHA-256: 4a64ddbf0da84acd86dd9e5407163caab070ed9bfa2fb96a85f419ce2c3e4b92
font_01_sfnt_off000065df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65DF 18644 bytes
SHA-256: 4aa2ecd7f30d135146cb0da63d14d78e4416c57184309ecfebfb2756f4fd5faa

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