Malicious PDF — malware analysis report

Static analysis result for SHA-256 138edcd947b2230b…

MALICIOUS

PDF

48.9 KB Created: 2021-06-03 09:14:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f0106d3c80b33e78f7ded51f51b814f1 SHA-1: fffcbd2871eb695bddf71bf8c346d5c5660c9c2f SHA-256: 138edcd947b2230b22aa73acdf74c949017dda916e98f0df8b0e44bb702274a8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and free in-game currency. The primary malicious URL identified is https://netcdn.online/app/479516143/minecraft-beta-free-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering lure to drive-by downloads or further malicious content. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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-beta-free-game-hack In PDF document text
    • https://digilib.stieama.ac.id/repository/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-hack-coin-master-cheat-engine_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/minecraft-java-server-hosting-free_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-hack-uk_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/2021-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-printable-roblox-images_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-can-you-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/is-tiktok-free-to-use_GM835599320.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/can-you-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-hack-apk-april-12-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/minecraft-free-download-mac_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-much-robux-can-you-get-with-1-million-dollars_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005470.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5470 28368 bytes
SHA-256: 01811c3aef9dfb055c76c6734b6039880c5bdcde408efba09b04b0705f64750d
font_01_sfnt_off00009438.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9438 2940 bytes
SHA-256: ae8acc7f13e86db3aed98d7dfb73e70e16f4dedb45e9f0467460b76f54e1a1bb
font_02_sfnt_off00009e47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E47 17784 bytes
SHA-256: ffa4e944bc3952cb658e805fb11da1f643d70f63a75572cc293d8aa9f3ac184d

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