Malicious PDF — malware analysis report

Static analysis result for SHA-256 583178fc4945e6df…

MALICIOUS

PDF

39.9 KB Created: 2021-06-27 23:09:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fc215a72e5a9deeb90caed4d09c8ad96 SHA-1: 640e7b91dd99a8258448fa834b274f8757032028 SHA-256: 583178fc4945e6df1050e3bfc59d10b692f48c5670556568a8c26694e94b0fa6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document employs a lure of "free Robux" and "game hack" to entice users. It contains multiple embedded links pointing to redirector infrastructure, specifically identified as malicious. The primary link, http://netcdn.co/app/431946152/free-robux-no-survey-no-download-no-offers-game-hack, is a known malicious redirector. The document's structure and embedded links suggest an attempt to lead the user to a malicious website or download a secondary payload, aligning with a phishing or social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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-no-survey-no-download-no-offers-game-hack In PDF document text
    • http://perpus.i2s-learning.com/repository/best-roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/crazy-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/do-robux-generators-work_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-free-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-old-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/www-robux-redeem_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-robux-meme_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/play-full-version-of-minecraft-for-free-no-download_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/codes-elemental-wars-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-app-free-download_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-demon_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/roblox-group-free-robux_GM431946152.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/can-you-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-robux-master_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000427f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x427F 22776 bytes
SHA-256: 04855c08700cb0eb828ba6af9ebb41f88e7b2177118265cf6ec3c3d5e227396d
font_01_sfnt_off00007593.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7593 19592 bytes
SHA-256: 1f1060709ea2d49093fb467aab9236e6bcea635fa9511ddf664cdfd4af96d450

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