Malicious PDF — malware analysis report

Static analysis result for SHA-256 f27f97551a6b100f…

MALICIOUS

PDF

35.3 KB Created: 2021-07-05 00:03:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4ea73c8158b8cc7f1d6ee3b2f736a3f0 SHA-1: e4f7515d18d46aa4051f99af8003ce13075df4a5 SHA-256: f27f97551a6b100f606d7fb77c71a7d64a353a90eb438546cdaf80e0a534154d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising 'free generators' or 'game hacks' to lure users. The primary redirector URL identified is http://netcdn.tw/app/835599320/without-tiktok-free-view-iphone-11-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a phishing or social engineering attack, likely delivered as a spearphishing attachment.

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/835599320/without-tiktok-free-view-iphone-11-game-hack In PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/coin-master-hack-spin-160-pro_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/free-roblox-wings_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/roblox-hack-2021-june_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/free-spins-coin-master-cheat_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/smurf-backpack-gives-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/coin-master-hack-mod-apk-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/gladiator-now-we-are-free-roblox-song-id_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/coin-master-free-mighty-lion-card_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/hack-nuevo-para-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/why-are-free-robux-games-on-front-page_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/inspect-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/how-to-hack-roblox-pet-simulator_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/coin-master-free-spins-link-no-verification_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/getrobux-come_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/minecraft-cheat-client_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/free-roblox-hack-no-survey-or-download_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/roblox-sin-hacks_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
font_00_sfnt_off0000337d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x337D 22344 bytes
SHA-256: 6ee06532ca8bfbaa3d9bd127ef0a57fccee38f2e8a33832715bf66fee73bbb64
font_01_sfnt_off00006526.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6526 19056 bytes
SHA-256: 6773beb7e6616f7904bb0829206e1dadfb4a2ba2f1a141e64305e38ac5be846f

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