Malicious PDF — malware analysis report

Static analysis result for SHA-256 40c289cc3bc9645e…

MALICIOUS

PDF

44.8 KB Created: 2021-06-03 04:45:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0e88df4a14ee854723d99dd655efde30 SHA-1: d1dd79b0cc6803dcbaf3c8959b8e209dbb581e9c SHA-256: 40c289cc3bc9645e63d7bc19a58b0d6d68abfdb73c9a444e2a5f6a2892a40486
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to malicious redirectors, masquerading as free game hacks or generators to entice users. The primary malicious URL identified is https://netcdn.online/app/479516143/minecraft-windows-free-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering attack aimed at driving traffic to potentially malicious sites.

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/479516143/minecraft-windows-free-game-hack In PDF document text
    • http://www.opac.stieimalang.ac.id/repository/free-robux-co_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/daily-spin_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/how-do-you-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/coin-master-hack-ios-without-verification_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/robux-giver_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/coin-master-hack-no-survey-2021_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/roblox-c9m_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/hack-coin-master-game_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/coin-master-ios-hack-download_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/coin-master-daily-free-spins-link-haktuts_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/robux-no-verification_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/hack-crack-for-coin-master-currency_GM406889139.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005425.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5425 25224 bytes
SHA-256: e91a676cd6d9c5b992c0ddaa7612148b496511584f6e2289a6bdab788573b7e0
font_01_sfnt_off00008cc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CC3 18244 bytes
SHA-256: 17ed61b8d418eb531f0e9f48c5430b9261b703312875c5060f44484e1085bb50

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