Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa1a51737ce29e07…

MALICIOUS

PDF

34.6 KB Created: 2021-06-18 05:58:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f7865cf444407f4662c8d67a67348ee8 SHA-1: 4abcab570faec4226c66bb5ee4d60de91ef274be SHA-256: fa1a51737ce29e0735007ca564788fe8dd06ecb05160e9740b59da6ddb97b6cd
160 Risk Score

Malware Insights

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

The PDF document contains multiple links, including a critical one to a known malicious redirector at http://netcdn.co/app/431946152/cheat-engine-roblox-bypass-zip-game-hack. This redirector likely serves as a lure for game-related cheats or hacks, aiming to trick users into downloading malware or visiting phishing sites. The ML classifier also strongly flagged this PDF as malicious.

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/cheat-engine-roblox-bypass-zip-game-hack In PDF document text
    • https://fib.ub.ac.id/sac/repository/hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/pro-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-website_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/robux-no-verification_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/mcpe-master-hack-unlimited-coins-latest-version_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/www-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-hack-pc-download_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-free-robux-for-roblox-pc_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-hack-coin-master-without-root_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-club-com_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-make-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-change-your-username-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-spin-coin-master-online_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-www-com_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/pokemon-go-free-9db_GM1094591345.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-hack-and-get-free-robux_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_off000030d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30D1 22064 bytes
SHA-256: e601ca3d1d5b319b0095fa0a6bd599ce181d80fceb2e1e7108a1580cafc70d73
font_01_sfnt_off00006173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6173 19324 bytes
SHA-256: c4d02edb4b769b160be4a6425762ae69f501e46f41551bdd8da6d772f40799ba

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