Malicious PDF — malware analysis report

Static analysis result for SHA-256 eac8a6617c86c62d…

MALICIOUS

PDF

44.2 KB Created: 2021-06-03 10:55:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 687db7e33d07be679ca9b4ce439a6f7b SHA-1: badef11994d5126d604f8bd214b8cbf14aa74470 SHA-256: eac8a6617c86c62dadce15ae0f5b1a6dd6f61cff091735615447b047e22978df
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, masquerading as game hacks or free generators. The document body, though heavily obfuscated, contains a URL that aligns with the heuristic findings. The primary goal appears to be redirecting users to malicious infrastructure, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/406889139/free-spins-link-in-coin-master-2021-game-hack In PDF document text
    • http://digilib.uim.ac.id/repository/free-face-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/pubg-uc-download_GM1330123889.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/best-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-op-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-hack-club_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/can-you-give-me-robux_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/pokemon-go-free-808_GM1094591345.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-free-coins-app_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/roblox-premium-free_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/hack-version-of-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-free-spins-that-really_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-hack-link-2021_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/optifine-mcpe_GM479516143.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/how-to-hack-coin-master-game-without-verification_GM406889139.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_off000051f3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51F3 24532 bytes
SHA-256: c6a430777369f57befd469279c534bb48534fd00d35a4b37f332e5c4b342af35
font_01_sfnt_off00008976.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8976 18456 bytes
SHA-256: 8f5be0faf1f43547a4f613946690c49555a623d75ecb5c591eda2449b2cabce1

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