Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcb302ab7a1a74a0…

MALICIOUS

PDF

43.7 KB Created: 2021-06-09 09:21:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3da69ab14c2397c828cdbf9979afa367 SHA-1: 08502f698afbc9f2fa2df5c4588bac82863448d5 SHA-256: dcb302ab7a1a74a02c27e4e52e8df0d80b6b9647e54881bafea3d0bec6c0d0e2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users to a malicious redirector infrastructure, specifically advertising "free Robux" and "game hacks". The primary malicious link identified is https://netcdn.tw/app/431946152/free-robux-xbox-one-2021-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or social engineering attack vector, likely intended to lead to further malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.tw/app/431946152/free-robux-xbox-one-2021-game-hack In PDF document text
    • http://library.fk.upnvj.ac.id/repository/robux-online_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/tower-of-hell-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-download-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-robux-rewards_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-black-suit-roblox_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-google-play-promo-codes-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/tower-of-hell-roblox-hack-mobile_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/robuxmatch-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-find-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-hack-pc_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-coin-spin-daily-link-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/auto-injector-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-apk-mod-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/minecraft-pe-free-apk_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
stream_004_off00004f44.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F44 24436 bytes
SHA-256: fd5ff0533d7a65f71b2e3afaa88f69982de16940af6e342f39d05e817408c19d
font_01_sfnt_off0000879a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x879A 18416 bytes
SHA-256: 78ce4d7f3c529c130c539091355346f28572af791ba0b008516c48bdb98989a6

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