Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c3bdf953ad3ae51…

MALICIOUS

PDF

34.3 KB Created: 2021-07-08 18:51:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7da61ecc8559053b084de9fb8b5d8418 SHA-1: aa37584bfa3ccd48837ea0ad44cd3c0bad2ef728 SHA-256: 2c3bdf953ad3ae518b457b9d6f46deafb5bed4ce0c71dea892023bc980298eda
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple heuristics indicating it links to malicious redirector infrastructure, specifically promoting 'free generator / game hack' lures. The document body and embedded URLs reinforce this by advertising free game items and hacks, ultimately pointing to the malicious URL http://netcdn.tw/app/431946152/free-roblox-promo-codes-for-robux-game-hack. This suggests a phishing or scam attempt designed to lead 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 http://netcdn.tw/app/431946152/free-roblox-promo-codes-for-robux-game-hack In PDF document text
    • http://library.unissula.ac.id/fk/repository/free-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/do-you-get-windows-10-minecraft-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/free-spin-coin-master-today_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-hack-ios-app_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-anti-cheat-update_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/how-to-make-a-private-server-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/tiktok-free-videos_GM835599320.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/minecraft-windows-10-code-free_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/cool-roblox-outfits-for-fre_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/get-free-robux-by-entering-thid-birthday_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/prison-life-hack-script-roblox_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-robux-and-tix-cheat_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-adidas-sachen-free_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/how-to-use-python-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-spins-coin-master-twitter_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-robux-online-no-verification_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/mangocheats-com-hack-coin-master-cheat_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/mobi-hack-robux_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/300-free-spins-coin-master_GM406889139.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_off00002eb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EB1 22248 bytes
SHA-256: 0cd1e91c0520a6a53a816bcaea035734615948a837a2ce8cdcc04653ecfd0d6b
font_01_sfnt_off00006000.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6000 19380 bytes
SHA-256: b9e13cbc0d8b8e2fa33e227b4ba01f3d99a632c345b6e3dc52c76698f84cc7c7