Malicious PDF — malware analysis report

Static analysis result for SHA-256 da578b5385b3382a…

MALICIOUS

PDF

33.6 KB Created: 2021-06-28 16:25:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d2c72f66b362b47955017487df5f8380 SHA-1: 093ee699d036b60f07f23565250f4b690f88d328 SHA-256: da578b5385b3382a5a4bfd5251a0320351bbb28b3b1a4e1aa4029ec1f9f29072
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple heuristics indicating malicious redirector links, specifically targeting users with lures for game hacks and generators. The primary malicious URL identified is http://netcdn.co/app/431946152/roblox-hack-minecraft-game-hack, which is flagged as a known malicious redirector. The document body reinforces this by containing calls to action and embedded URLs related to obtaining free Robux or game hacks, suggesting a phishing or scam attempt.

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-hack-minecraft-game-hack In PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-minecraft-java-server_GM479516143.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/mobi-hack-robux_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-to-get-free-robux-survey_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-to-hack-through-walls-in-jailbreak-roblox_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/roblox-hack-and-cheats-apk_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/gamesofficenet-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-car-jailbreak-roblox_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/mc-hacks_GM479516143.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/pokemon-go-free-download-hack_GM1094591345.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/roblox-lua-executor-free_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-to-get-free-robux-easy-and-simple_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-gift-card-roblox-giverway_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/mcpe-master-hack-unlimited-coins_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/are-there-any-coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-robux-hack-100-working-2021_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-to-become-unkillable-in-wild-savanna-in-roblox-hack_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_off00002d8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D8E 22048 bytes
SHA-256: d5b72497a119d8b86fd1aba54bbb77921cfc9c9c5172adc25e698339943cd22c
font_01_sfnt_off00005e2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E2F 19076 bytes
SHA-256: cf82b8442516202a02a8efad902741a55f7b8cc7efed481ea3aed80fd4e2badd

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