Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d24d8bb20b1789a…

MALICIOUS

PDF

37.1 KB Created: 2021-06-26 09:53:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7aa6d804893137e8152de6e2c0248522 SHA-1: 55aefd527a962c8e8059b57721514d1d7595526c SHA-256: 4d24d8bb20b1789a60463590e72fe8640fe38097a10315ec328cf4d48bbbe715
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for free Robux, a popular online game currency, and includes external URIs pointing to download sites. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of it being a phishing or malware distribution attempt. While no scripts were directly extracted, the presence of embedded URIs and the document's theme suggest it's designed to trick users into downloading a second-stage payload.

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/how-to-get-free-robux-by-watching-a-video-game-hack In PDF document text
    • http://digilibfisip.unla.ac.id/repository/counter-blox-roblox-offensive-hacks-marca-los-objetivos_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/infinite-robux-cheat_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/roblox-hack-robux-free-2021-download_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-robux-genrator-no-human-ferfacon_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/dumptruck-simulator-hack-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/coin-master-400-spin-link-hack_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/roblox-cheats-for-free-tix_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/roblox-bandit-simulator-hacker-crate_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-tiktok-views-no-verification_GM835599320.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/break-free-dangerous-woman-tour-studio-version-roblox-music-code_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/is-there-a-way-to-get-free-bobux-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-to-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-robux-and-tix-place_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/https-growbux-net-free-robux_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/no-cool-down-hack-roblox-sword-burst-online-mac_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/roblox-free-models_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
stream_002_off000033d6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33D6 23708 bytes
SHA-256: d0c8ca90f53abebad85c47ddc8068e17f9ddbd4633345080837697ee34a2c2e5
font_01_sfnt_off0000697d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x697D 19956 bytes
SHA-256: a5cb875adfe088abb7e454751686cc91654199eb34b06a20d7cf5ef857750334

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