Malicious PDF — malware analysis report

Static analysis result for SHA-256 19a327a371de2473…

MALICIOUS

PDF

33.9 KB Created: 2021-07-06 11:52:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c431945ace064845480af39f7684f952 SHA-1: d3bdc0a07b37f0466390c624a8a3e7b60e507b0a SHA-256: 19a327a371de247325706153b7f24902b6680cbae7934a4b51bfd7049d475a3e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting 'free generator' or 'game hack' lures. The primary URL, http://netcdn.tw/app/479516143/how-to-get-minecraft-dungeons-for-free-game-hack, is flagged as a malicious redirector. The document body and heuristics indicate a social engineering tactic to trick users into visiting these sites, likely for further malware delivery or credential harvesting.

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/479516143/how-to-get-minecraft-dungeons-for-free-game-hack In PDF document text
    • http://razredna-nastava.net/files/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-hack-mod_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/minecraft-116-1-download_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/como-hackear-el-juego-coin-master_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-free-spin-and-coins-fbid-links_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/hacks-for-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-roblox-dominus-november-2021_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-claim-spins_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-to-get-free-robux-no-inspecting_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-apk-hack_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-free_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-to-get-free-pet-dog-in-adopt-me-roblox_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-spins-for-coin-master-on-1-19-19_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-roblox-youtubers-accounts-with-passwords-2021_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-to-fly-hack-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-robux-steps_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
font_00_sfnt_off0000309c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x309C 22064 bytes
SHA-256: c07c482a94672d6c9ab7c86d013d4b3d7095615422f82243dfee9c28508928b3
font_01_sfnt_off00006134.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6134 18472 bytes
SHA-256: 65ee82f26cafa7906902f4dbf8f4098f0781a130d3f16ad2d63d9ccc83542dd0

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