Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c3019bc17c45e80…

MALICIOUS

PDF

44.6 KB Created: 2021-05-12 07:31:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 39f64fda1f792140046beeb66924e08f SHA-1: 0c6958f649fd4be3dc260b681872c03cffbe63af SHA-256: 4c3019bc17c45e808474405d822feab405f1e547f03556227381ad3c624536d8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to a known malicious infrastructure, specifically advertising 'free generator / game hack' lures. The document body, though heavily obfuscated, contains references to these lures and the malicious URL. The presence of these malicious links and the ML classifier's high confidence score indicate a phishing or scam attempt designed to redirect users to potentially harmful content.

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 https://netcdn.xyz/app/406889139/coin-master-free-spins-2-5-2021-game-hack In PDF document text
    • https://digilib.stieama.ac.id/repository/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/robux-free-co_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-game-android-free-download_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-youtube_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-top_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-domain-for-minecraft-server_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-earn_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-hack-version-download-2021-ios_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/www-coin-master-hack-tk_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/minecraft-reach-hack_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/try-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/john-doe-roblox-hacker_GM431946152.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_003_off00004a85.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A85 29008 bytes
SHA-256: 2d28a7e6d689f73d88620a8c063f23b0ad750b640348e7266c293560f0a146be
font_01_sfnt_off00008bb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BB6 18420 bytes
SHA-256: fc9c1cd0ccc985f14e0cb904a615d0991f1fd615bf6bb58e7d206b3ec4fad204

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