Malicious PDF — malware analysis report

Static analysis result for SHA-256 5de281190f21cc5c…

MALICIOUS

PDF

33.4 KB Created: 2021-06-18 23:09:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4481787bedafee3ac87b575ea527e60b SHA-1: a97212ccab8599d6e3bbfd2b8589e226f2afd586 SHA-256: 5de281190f21cc5cabec79899040efc66b880b0b0c7805e2d739d1921036dcee
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for free Robux and game hacks, directing users to malicious redirector URLs. The heuristic PDF_GAME_HACK_REDIRECT_LURE specifically flags this behavior. While no scripts were extracted, the document's structure and embedded URLs strongly suggest a phishing or scam attempt designed to lead users to potentially harmful content.

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/how-to-earn-a-ton-of-robux-for-free-game-hack In PDF document text
    • http://perpus.masda.ac.id/repository/appbounty-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/is-roblox-free-on-pc_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/how-to-get-free-spins-on-coin-master-2021-links_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/robuxglobalcom-no-verification_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/roblox-sued_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/pubg-uc-carding-in-pakistan_GM1330123889.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-roblox-clothes-for-your-avatar_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-hack-2021-link_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-free-spin_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/wurst-client_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/se-puede-hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-daily-free-spins-link-today-blog_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-hacks-free-spins_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_off00002cb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CB7 22136 bytes
SHA-256: 0cea583354e98b8b7ebe4bf6cd0258fc50a3f32c173fbfb4c6515d706751c3cc
font_01_sfnt_off00005dab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DAB 18880 bytes
SHA-256: 06217ed0ff1479873e1678e6dff1dd521aff6480c58883535654adf496b305d0

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