Malicious PDF — malware analysis report

Static analysis result for SHA-256 b72200d56c845885…

MALICIOUS

PDF

35.6 KB Created: 2021-07-06 23:29:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fa8679fd4b818d1410cba237686c842f SHA-1: c03d23b9cd308eb6c697bb95f52f303f4f4638fd SHA-256: b72200d56c845885833c0027cc3b99fafeefde6a2a3eee3e23426e8e8bc234c8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one pointing to a known malicious redirector infrastructure at http://netcdn.tw/app/431946152/roblox-bloxburg-hack-game-hack. This lure is presented as a 'free generator / game hack', indicating a social engineering tactic to trick users into visiting potentially harmful sites. The ML classifier also strongly flagged this PDF as malicious.

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/roblox-bloxburg-hack-game-hack In PDF document text
    • https://www.zagorjeadventureteam.hr/files/free-roblox-freeze-tag-games_GM431946152.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/coin-master-generator-free_GM406889139.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/roblox-guns-r15-script-hack_GM431946152.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/minecraft-hax-download-no-virus_GM479516143.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/withdraw-robux_GM431946152.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/coin-master-free-spins-link-2021-download_GM406889139.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/coin-master-card-hack-app_GM406889139.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/how-to-hack-roblox-robux-using-cheat-engine_GM431946152.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/how-to-get-minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/free-robux-please_GM431946152.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/earn-free-robux-legally_GM431946152.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/roblox-before-dawn-hack-pastebin_GM431946152.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/booga-booga-hack-roblox-download_GM431946152.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/coin-master-hacksco_GM406889139.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/free-bobux_GM431946152.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/what-is-coin-master_GM406889139.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/hack-roblox-accounts-with-cookie-editor_GM431946152.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/roblox-points-free-robux_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
stream_002_off00003239.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3239 23312 bytes
SHA-256: d54a53fa7286ffaaf8aef3dda2c8151ab8eb18d80ef7559a539d23c648bac950
font_01_sfnt_off00006705.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6705 18796 bytes
SHA-256: f6c6cfc8a4c74313b99c280e337f52933cf16367538b4e099c104341d6f73406

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