Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5e9079aa3ea5a1a…

MALICIOUS

PDF

45.8 KB Created: 2021-06-03 06:25:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2507a3d43c730d8d6e17ec457ab7c5a9 SHA-1: b9aec033211e6c19e727f35eddc05c6363202728 SHA-256: a5e9079aa3ea5a1adc74d453052b9657fe8f997705e8b95e93551f25576b1853
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free Robux'. The primary redirect URL is https://netcdn.online/app/431946152/how-to-get-2021-robux-for-free-game-hack. This lure is designed to trick users into clicking through to potentially harmful content or further malicious downloads. No scripts were extracted, but the embedded links and the ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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 https://netcdn.online/app/431946152/how-to-get-2021-robux-for-free-game-hack In PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/hack-coin-master-app_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/cm-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-32-hack-apk_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/coin-master-free-spins-and-coins-without-human-verification_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-new-cards-hack_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/how-to-get-800-robux-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/free-minecraft-mods-for-xbox-one_GM479516143.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/minecraft-free-download_GM479516143.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/spin-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/make-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/pokemon-go-free-coins-apk_GM1094591345.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/minecraft-wurst-hacked-client_GM479516143.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/robux-giver_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/free-coin-master-link-2021_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
stream_004_off0000549c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x549C 25596 bytes
SHA-256: 3a0d4f8eb91d5acfb41b133e30fa3ca31255fd2bf1ffe04ea58e687c1c5054e8
font_01_sfnt_off00008f0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F0C 18684 bytes
SHA-256: 6e9c0eecafd635f65838c8dbfb1e23e8457e4c9239d4b33e445d621fd980b18f

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