Malicious PDF — malware analysis report

Static analysis result for SHA-256 a177dd630e29c869…

MALICIOUS

PDF

44.3 KB Created: 2021-06-03 13:02:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 100bb475adac64798469d77e23056701 SHA-1: e9bd0c6ae45f29b1e203edacbb9624de6dc07067 SHA-256: a177dd630e29c869159b75456b54db90a0d86fb8b27c1b286ed54f90d962a438
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites offering game hacks and free Robux, identified as malicious redirectors. The document body, though heavily obfuscated, contains references to 'Free Robux Sites 2021' and a URL that aligns with the heuristic findings. The presence of embedded URLs and the lure of free in-game currency strongly suggest a phishing or scam attempt designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.online/app/431946152/free-robux-sites-2021-game-hack In PDF document text
    • http://perpus.i2s-learning.com/repository/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/freespinandcoin_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-spin-coin-master-instagram_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/coin-master-free-spins-link-iphone_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/where-to-get-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-hack-tool-india_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/pokemon-go-free-joystick-ios_GM1094591345.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-com-free-play_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-free-spin-app-iphone_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-change-your-name-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/100-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/how-do-you-get-free-robux-without-doing-anything_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_off0000515a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x515A 24412 bytes
SHA-256: 35aa811aea26661ac0dfa67f5ca7c2cabc229e7e4204b153a658e984d84216a9
font_01_sfnt_off00008935.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8935 18640 bytes
SHA-256: b8260c20a5a482fa631977c1895ef4fabb59c0a91f65cf95745fb521070d0a95

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