Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f356eae85dbbfec…

MALICIOUS

PDF

34.4 KB Created: 2021-06-29 09:02:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: afcc278386a2711c9d7c89e400798381 SHA-1: 08138111e397e039105ef37becf74a1d2735636f SHA-256: 5f356eae85dbbfec565b4b1172b30ff524044671e9ac4d4964c7ed3de0456f64
160 Risk Score

Malware Insights

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

This PDF document employs a lure of game hacks and cheats to entice users into clicking malicious links. The primary link, http://netcdn.co/app/431946152/download-hacks-for-roblox-jump-game-hack, is identified as a malicious redirector. While no scripts were extracted, the document's structure and embedded URLs strongly suggest an attempt to deliver a second-stage payload or lead the user to a phishing site. The ML classifier also flagged this PDF with high confidence.

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/download-hacks-for-roblox-jump-game-hack In PDF document text
    • http://library.imz.or.id/repository/coin-master-free-spins-daily-link-game-mod_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/free-coin-master-spin-generator_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/roblox-jailbreak-free-vip-server-link-in-description_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/phantom-forces-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/free-roblox-like-game_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/hackers-on-roblox-that-will-give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/free-robux-right-now_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/legit-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/free-executor-for-roblox-pc-2021-no-virus_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/www-roblox-tv-free-robux_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/hack-para-jailbreak-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/free-spin-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/is-bloxburg-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/jack-hack-for-roblox_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/coin-master-cards-for-free_GM406889139.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_off00002e32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E32 21860 bytes
SHA-256: 756c838d27de43465e1572391bab8609e697e4d7a7ba89a1726f961bbb6b10d1
font_01_sfnt_off00005e73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E73 20068 bytes
SHA-256: 51ed6afaa978cb289405b230b0f29a7765fbf3a0dd56d90134ec6b3a31003446

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