Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1610c3d1d9d1993…

MALICIOUS

PDF

36.0 KB Created: 2021-06-28 06:30:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e5c77bc6277a92573970d0b9551510c3 SHA-1: 095f7e9ab5dfa01edf83cbbac98c4137c2201d37 SHA-256: c1610c3d1d9d199397b0549a36073518c513414682132cd0c13461341dde1d8e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains multiple links to known malicious redirectors, disguised as "free generators" or "game hacks" for popular games. The primary lure is the URL http://netcdn.co/app/431946152/free-robux-for-roblox-generator-no-human-vertification-game-hack, which is associated with malicious redirector infrastructure. The document body and embedded URLs suggest a social engineering tactic to trick users into visiting these sites, likely leading to further malware downloads or credential harvesting. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/free-robux-for-roblox-generator-no-human-vertification-game-hack In PDF document text
    • http://stikespantirapih.ac.id/home/repository/todays-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-robux-android_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-follow-a-player-everywhere-he-goes-roblox-hack_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/20k-robux-accounts-free_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/roblox-generator-com_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-get-more-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/www-claim-gg-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/coin-master-links-for-today_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/coin-master-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/robux-inspect-hack-2021_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/roblox-free-exploit-executor_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/robux-free-c_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/all-free-items-in-roblox_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-roblox-shirts-to-upload_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/hack-pc-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/coin-master-email-rewards-link_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/roblox-hack-exploit-2021_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-robux-info_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_off0000316e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x316E 23988 bytes
SHA-256: 7e331d170a3d1c9ddf4643cc38d67038a3d30c6c84c9dffcfdbc866a7693c1c4
font_01_sfnt_off00006705.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6705 19408 bytes
SHA-256: 70c9fa01b62b16087ce3fb5155b5cb4121d7963fe07d7573f3e4f25e28afcae0

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