Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fa92a90ce4d9d91…

MALICIOUS

PDF

33.7 KB Created: 2021-06-30 13:54:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d438b209d5a03447c039bd7c563e838b SHA-1: d18a93ecd1aef2a943fbeec2090fc013cd3b8bb6 SHA-256: 2fa92a90ce4d9d91ae685f4a42c6c2f2282e84127a62f733ea77683d83a8ace1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure for free in-game currency, directing users to a malicious redirector. The ML classifier also flagged this PDF as malicious. The embedded URLs and the document body content strongly suggest a phishing or scam attempt to trick users into visiting malicious sites.

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-com-get-robux-for-free-game-hack In PDF document text
    • https://library.iuli.ac.id/repository/put-cheat-codes-roblox_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/roblox-noclip-hack-2021-cheat-engiene_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/robux-hack-without-downloading-games_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/free-robux-no-human-verification-or-survey-or-email_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/descargar-hack-para-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/pastebin-robux-hack-free_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/how-to-get-free-robux-enter-code_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/robux-hack-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/roblox-counter-blox-cheats_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/today-coin-master-spin-free_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/cool-free-roblox-items_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/roblox-airjump-hack_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/roblox-cheats-for-xbox-one_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/roblox-shadowrun-skip-cheat-codes_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/roblox-how-to-get-a-free-dominus-hat-2021-august_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
font_00_sfnt_off00002e9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E9E 21648 bytes
SHA-256: 5b787ba6d370e7b8a0927423cd1b112401acc8c39dd49ae78e8c9d91f357361e
font_01_sfnt_off00005e2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E2C 19152 bytes
SHA-256: b8211a3cc341aa2dc1ea2fb5855ff27c3cf8ba5fcb8f9ed76e5e1583b7d92d20

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