Malicious PDF — malware analysis report

Static analysis result for SHA-256 03e4a4e8ba8b37a5…

MALICIOUS

PDF

32.7 KB Created: 2021-07-03 15:21:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1decbb5ea5946bda253b7d4a75cadd6b SHA-1: 6a3fb3f9aa54cb16bf8ac299d195e77e1ad9f261 SHA-256: 03e4a4e8ba8b37a5b17ca7662cbd27c8deb8ad30283cad368d533e73b8a6bdef
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.tw/app/431946152/blox-land-free-robux-game-hack. This lure is designed to trick users into believing they can obtain free game items or hacks. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful sites. No scripts were extracted from this sample.

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/blox-land-free-robux-game-hack In PDF document text
    • http://opac.library.uib.ac.id//repository/free-roblox-website_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/coin-master-hacks-for-iphone_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/coin-master-rewards-app_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/roblox-com-redeem_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/coin-master-heaven-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/minecraft-pe-free-download-android_GM479516143.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/free-roblox-pin-codes_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/www-coinmaster_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/how-can-i-get-free-coinsn-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/how-to-hack-roblox-jailbreak-noclip-2021_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/anti-cheat-roblox_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/minecraft-for-free-games_GM479516143.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/minecraft-116-free_GM479516143.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_off00002c37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C37 21488 bytes
SHA-256: 294f5f3f88403f867a3bec0b70eb870b291d2605b0f6058c84bdc8a01b6139ce
font_01_sfnt_off00005af4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AF4 18964 bytes
SHA-256: 3f12ef93e3f94e19068a8415642f40f3a4d95b4d38f37f1bdada02c05cec8b59

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