Malicious PDF — malware analysis report

Static analysis result for SHA-256 645076bd8c1bc208…

MALICIOUS

PDF

43.4 KB Created: 2021-05-12 18:14:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2b72724e5a747daf61a3446a2f0342eb SHA-1: d851f44264dfa24d51752aa5065462ca4f33c9f9 SHA-256: 645076bd8c1bc208f42d1f7db3c8998d7f1b60e9946d5f9a42329b47db33fb4f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to websites that are identified as malicious redirectors, specifically advertising 'free generators' and 'game hacks'. The document body, though partially obfuscated, also contains references to these lures. The primary function appears to be directing users to potentially malicious sites, likely for further payload delivery or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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.xyz/app/431946152/free-robux-cards-game-hack In PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/coin-master-hacks-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/original-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/hacking-apps-for-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/roblox-bloxburg-free-money_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/minecraft-mods-download-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/free-spin-link-coin-master-app_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/coin-master-free-download-app_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/master-free-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/haktuts-coin-master-free-spin-link-today_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/i-need-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/roblox-hack-ga_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/free-roblox-shirt-templates-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/minecraft-redeem-code-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/minecraft-hacks-wurst_GM479516143.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_off00004b01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B01 25624 bytes
SHA-256: ffdc69b90d569753f48fa4165fe069a0226bfdb4863cfcac1d171eca4d37a818
font_01_sfnt_off000086fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86FE 18416 bytes
SHA-256: 79c56a0f23d4fc34690a575a065be14b64911c3c5a3331038291264b4b7107af

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