Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8bf73c0f2f6d4e2…

MALICIOUS

PDF

37.5 KB Created: 2021-07-01 10:21:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 23ab30ac460d23257801fb4007c41841 SHA-1: 882ff599d9cfb59728b937d0da202c2dc85dbb81 SHA-256: d8bf73c0f2f6d4e231c04e3885b103b622c555e3d9ec20427c5db38b3e41cf9f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and game hack lures, indicating a phishing or malware distribution attempt. The document body and embedded URLs suggest the lure is related to game exploits and currency generators for games like Roblox and Coin Master. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a malicious workflow designed to lead the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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.co/app/431946152/roblox-hack-tool-2021-download-game-hack In PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-800-robux_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/cheat-bad-business-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/roblox-cheat-engine-god-mode_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/hack-coin-master-online_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/como-hackear-robux-en-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/descargar-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/best-roblox-free-hacks-exploits_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-unlimited-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/roblox-hack-scripting-language_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-robux-without-human-verification-on-pc_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/hacking-into-jd-roblox-account_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/hack-roblox-windows-10_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-to-et-free-faces-on-roblox-easy_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-to-get-robux-with-out-hack-and-paying_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/site-17-hack-gui-roblox-script_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/hack-for-roblox-wont-get-banned_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/hacks-para-robux_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off00003811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3811 23216 bytes
SHA-256: 942fae5149b5a29d1c3b992792464f9bd6d0b4dbe2aa3023b00e35eaea9e5d5e
font_01_sfnt_off00006c08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C08 19564 bytes
SHA-256: 3ec176b0f4be237b57d2abf6796b399fb15fb87d85f7ae0b5750f18f1d313134

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