Malicious PDF — malware analysis report

Static analysis result for SHA-256 4aa59c6d5e6b4421…

MALICIOUS

PDF

35.0 KB Created: 2021-06-28 02:47:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 764e7e8e86d683aaf96c8a265a4e015c SHA-1: c8ac7420e5fa862fe78e8ca23b9526b728fbee89 SHA-256: 4aa59c6d5e6b44211496d9eae5b7911167b4c9c229872728d8a155cefee8d6fb
160 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs and text referencing hacks and cheats for popular games, strongly suggesting a lure to download malicious software. The ML classifier also flagged this PDF with high confidence. The primary IOC is the URL http://netcdn.co/app/431946152/roblox-meep-city-free-plus-hack-game-hack, which likely hosts the 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/roblox-meep-city-free-plus-hack-game-hack In PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-32-mod-hack-unlimited_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-free-spins-link-2021-ios_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-roblox-money_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-robux-giveaway-live_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/best-free-shirts-on-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-hack-any-roblox-account-june-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-rs-in-roblox-free-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-cheat-apk-free-download_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-fisticuffs-hack_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-cheats-2021-may_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/nametag-fornite-hack-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/how-to-hack-people-on-roblox_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_off00002ea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EA3 22700 bytes
SHA-256: 2a0875952f95dbb06382d910dafd62c2152d80d907ad625a52d04dabc5c150c7
font_01_sfnt_off0000615d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x615D 19892 bytes
SHA-256: ccc2a2b5ca36fde518ca81cab5c1554ee7a8f643612baf9d310230ddd82d80e5

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