Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4848c8df58cbcce…

MALICIOUS

PDF

33.9 KB Created: 2021-06-30 05:06:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 41c0978e7c75603bf148e77a3a255cb5 SHA-1: 72e524f31ce3eb02eee3b7031ae296bf6af651c4 SHA-256: d4848c8df58cbccec03e5c7fb528cc3b0e0f3b32284ce12a128755b4db9848b0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to malicious redirectors, disguised as 'free generator / game hack' lures. The primary link, http://netcdn.co/app/431946152/how-to-get-free-robux-on-computer-2021-game-hack, is designed to trick users into downloading potentially unwanted or malicious software. The ML classifier strongly indicated maliciousness, and the presence of numerous redirector links supports this assessment.

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-on-computer-2021-game-hack In PDF document text
    • http://perpus.i2s-learning.com/repository/can-my-childs-friend-hack-roblox-game_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-create-roblox-hack-place_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/10-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-com-robux-cheat_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-bloxburg-hack_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-free-robux-hackers_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-get-roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/microsoft-roblox-rewards_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-minecraft-bedrock-server_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-hack-roblox-player_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-free-online_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/minecraft-packs-free_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-robux-with-no-survey_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_off00002e20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E20 21340 bytes
SHA-256: f648949a0112bf8d0bdaa3758d9987c86f6a6703d8e06ec0c263d8ff54f16e0d
font_01_sfnt_off00005cbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CBF 19820 bytes
SHA-256: e02d96a42038de2872cdd38598a950b7977befb5fb99d4e9f218ba5ffa2fc5e9

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