Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9608c81c757086e…

MALICIOUS

PDF

49.7 KB Created: 2021-06-10 14:29:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 01a0681af2f1c0c618eb0541403af638 SHA-1: 0ac589162cb869890f7545d9a81aee76519275e5 SHA-256: e9608c81c757086e24bd2e8744c6765fb8b5ba228dfa107f2b7a822a9875bdd2
160 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating it is a malicious redirector, specifically luring users with 'free generator / game hack' content. The primary malicious URL identified is https://netcdn.tw/app/431946152/pixel-art-roblox-hack-game-hack, which is associated with known malicious redirector infrastructure. The document body, though partially obfuscated, contains references to 'Roblox Hack' and the same URL, reinforcing the lure. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

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/pixel-art-roblox-hack-game-hack In PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/get-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id//repository/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id//repository/roblox-free-play-no-download_GM431946152.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/coin-master-free-spin-and-coin-link-today_GM406889139.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/coin-master-home_GM406889139.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/how-to-get-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id//repository/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/free-coin-master-spin-generator_GM406889139.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id//repository/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/get-free-coin-master_GM406889139.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id//repository/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/free-spins-on-coin-master-2021-ios_GM406889139.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/roblox-spider-man-free_GM431946152.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/village-4-coin-master_GM406889139.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/rbx-free_GM431946152.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id//repository/minecraft-dungeons-free-download_GM479516143.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id//repository/roblox-phantom-forces-hack_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_off00005186.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5186 34944 bytes
SHA-256: 75bb20efc3eed950bf761757f4df6f278f2b5b30d31db25ac0dfcb5015c6120e
font_01_sfnt_off00009f4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F4A 18560 bytes
SHA-256: f03ab2f9dc3cd41e2bf6540d565636712e7eb9f6ce90ffceb25332bcedeb00b9

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