Malicious PDF — malware analysis report

Static analysis result for SHA-256 37c42d56ef27ad1c…

MALICIOUS

PDF

34.6 KB Created: 2021-07-08 00:18:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 345aa87a49d3918ca58b7c1d7d1831ef SHA-1: 2af3b3c6f3c33ac1777db3444a8cd6adfd543c70 SHA-256: 37c42d56ef27ad1ca7b7e43c6fa2cf8ac0342cef0851d1697994b0a591e73bbf
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs, with a critical heuristic identifying a link to known malicious redirector infrastructure. The document body and heuristics indicate a lure for 'free generator / game hack' content, aiming to redirect users to potentially malicious sites. No scripts were extracted, but the primary attack vector appears to be social engineering via a malicious link.

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/free-coins-coin-master-game-hack In PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/naruto-rpg-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/free-roblox-gift-cards-december-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/how-to-get-a-free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/how-to-make-everything-free-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/hello-neighbor-roblox-free-download_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/coin-master-free-spins-link-2021-april_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/robux-generators-that-actually-work_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/how-to-get-minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/coin-master-hack-tool-v1-9-download-free-pc_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/free-robux-hack-download-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/robux-hack-without-downloading-stuff_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/free-super-happy-face-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/roblox-hack-apk_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/how-to-get-unlimited-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/free-accounts-with-robux-2021_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_off00003218.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3218 22760 bytes
SHA-256: e6b441af336d7c818c721cabb91ff8ff9c523e0d971eeaeefeb1ad91e835cfbc
font_01_sfnt_off0000657d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x657D 17996 bytes
SHA-256: db592684bbdaaeb7647633841870edbd5981f70e843d3403859f62ceb8e0c83d

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