Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c2b195b8e51f4d9…

MALICIOUS

PDF

33.8 KB Created: 2021-07-03 20:59:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5d5117d72f9944dce9773e9237db5ed8 SHA-1: b00e257c4be194644352cb7e9323b753ebf7af1f SHA-256: 9c2b195b8e51f4d985eed8fefb068db0b10972b124ae9f94f725a45351732d1a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising free generators and game hacks. The primary redirector URL is http://netcdn.tw/app/479516143/free-minecraft-server-game-hack. This indicates a social engineering lure designed to trick users into visiting potentially harmful websites. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence score support the malicious verdict.

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/free-minecraft-server-game-hack In PDF document text
    • https://digilib.darmajaya.ac.id/repository/free-robux-generator-youtube_GM431946152.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/free-gamepass-roblox-scripts-site-v3rmillionnet_GM431946152.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/hack-coin-master-apk-31_GM406889139.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/cm-spin-link_GM406889139.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/static-moonactive_GM406889139.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/roblox-hack-game_GM431946152.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/coin-master-free-coins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/how-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/picture-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/cool-minecraft-hacks_GM479516143.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_off000031f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31F6 21960 bytes
SHA-256: 79d01d9faa00432da7fc73abaabaf1c9f4db4145c2898f8ea3904a91f3a9f9df
font_01_sfnt_off0000626c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x626C 17968 bytes
SHA-256: 467ba59745922621ddb9e57f68c7b79a6418f7a75fac5793c5b2ba4d9bdeb419

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