Malicious PDF — malware analysis report

Static analysis result for SHA-256 57b02156bbd2ca91…

MALICIOUS

PDF

31.7 KB Created: 2021-07-06 10:07:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 366e4aa5c5438886d70fdcf1df769dcc SHA-1: 83fad6344c3a039f706471ac01ee8a853ccef4dc SHA-256: 57b02156bbd2ca91b52a1b94ffe3f1d442ab33de0696ff6d5adf3370fccfa6a8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to redirector infrastructure, specifically advertising 'free generators' and 'game hacks' for popular games. The primary malicious link identified is http://netcdn.tw/app/406889139/static-moonactive-game-hack, which is flagged as a known malicious redirector. The document body also contains a call-to-action phrase, 'CLICK HERE TO ACCESS COIN MASTER GENERATOR', further reinforcing the lure. While no scripts were explicitly extracted, the nature of the links and the lure suggest a potential download or redirection to a malicious payload, likely involving JavaScript execution if the user interacts with the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/406889139/static-moonactive-game-hack In PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/hack-coin-master-apk-31_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-money-cheat-2021_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-avatar-girl_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-description_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/hacks-for-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/tiktok-free-tv-shows_GM835599320.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-zombie-attack-cheats_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-free-robux-google-chrome_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/legit-coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/robux-free-100-real_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/50-free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/prison-life-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-giver-2021_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-today-only_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-free-robux-no-verification_GM431946152.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
font_00_sfnt_off000029d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29D6 21960 bytes
SHA-256: 44477ebc4be6f416431a443ca434456501b73cd98ce59100be54f3745a47ea7d
font_01_sfnt_off00005a56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A56 17948 bytes
SHA-256: d942d3997741433eac321740d06464204a1c132eec26b7d4f5b5c0c9669a93de

Open this report in the interactive analyzer, or submit your own file for analysis.