Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a4af1a277b48ec9…

MALICIOUS

PDF

34.7 KB Created: 2021-06-28 18:23:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 87f315cf088f59d333658577ac20b0b7 SHA-1: 0cfcc7e3eddef5f2c0f6e720d79a0ea23b88f627 SHA-256: 9a4af1a277b48ec9e58eabf5a2699fe58e784e1336aeb53eb2d6ab65a0cf1b39
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as "free generator / game hack" lures for popular games like Roblox. The document body and embedded URLs strongly suggest a phishing or scam attempt to trick users into visiting malicious sites. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence indicate a high likelihood of malicious intent.

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.co/app/431946152/roblox-free-items-september-2021-game-hack In PDF document text
    • http://library.fk.upnvj.ac.id/repository/roblox-booga-booga-admin-script-hack_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-heaven-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-roblox-sex-games_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/hack-cbro-roblox_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/roblox-anime-characters-free_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-hack-peoples-account-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/roblox-robux-2021-free_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-coin-master-spins-no-verification_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/roblox-hacker-report-system_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/roblox-id-code-for-cheats-code-for-hoes_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-get-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-get-dominus-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-robux-legit-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/roblox-hack-apk-2401_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-roblox-accounts-november-2021_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-hack-mod-apk_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_off00002fff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FFF 22084 bytes
SHA-256: b9cc62426e57fd67869b6a6af21c0c8f0e87814d3c42687eecd411eabbff3342
font_01_sfnt_off000060c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60C9 19592 bytes
SHA-256: aac81d04a3109ad1399b88e20545408023ffee3640e24685eaf04004fe362e53

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