Malicious PDF — malware analysis report

Static analysis result for SHA-256 e616e15698e2847c…

MALICIOUS

PDF

34.5 KB Created: 2021-07-04 17:00:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d69f06fa5d928979d13dfe86cabb4b76 SHA-1: e7522a2ece7d4cb82e59420ff7d3f459c62a0e27 SHA-256: e616e15698e2847c18f1563531e88cbc6ddd3976cf87ccf56a70954b079b3a6b
160 Risk Score

Malware Insights

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

The PDF contains multiple links to a redirector hosted on 'netcdn.tw', which is flagged as malicious infrastructure. The document body and heuristics indicate a lure for game-related hacks or generators, suggesting the user is intended to download a malicious payload. The ML classifier strongly supports the malicious nature of this PDF.

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/spin-coin-master-game-hack In PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/free-coin-master-stuff_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/how-to-hack-someone-on-roblox-2021-without-password_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/roblox-website-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/free-models-roblox-virus_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/roblox-free-codes-generator-no-surveys-no-download_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/general-roblox-script-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/free-robux-model_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/tiniest-roblox-avatr-with-free-items_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/xray-mod-minecraft-114_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/coin-master-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/hack-to-find-peoples-game-in-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/free-robux-now-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/reddit-roblox-money-hacks_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/como-recuperar-cuenta-de-roblox-hackeada_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/coin-master-guide-to-free-spins-and-rewards_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/free-robux-forumcom_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/roblox-adonis-admin-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/roblox-admin-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/free-robux-no-survey-no-download-2021-no-human-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_off00002ff0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FF0 23348 bytes
SHA-256: a7e2e4efaa668380c10b49039f43186ac347cbbc8c328f1c66825232eeca019f
font_01_sfnt_off000064c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64C2 18008 bytes
SHA-256: 444f15a35c78c166699adcd76a2f0f40f85467b2212850aa9b6780836aa8b23a

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