Malicious PDF — malware analysis report

Static analysis result for SHA-256 879631dcd93cff19…

MALICIOUS

PDF

45.4 KB Created: 2021-06-03 14:34:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fa311eb7e07f82300eb0a998edf156c4 SHA-1: 67b060a540462558df0d33fdd5f845f64addb63e SHA-256: 879631dcd93cff190c69be81eb8a5cb3f2864204b9ea27578e6e772f0f82cacf
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting 'free Robux' and game hacks. The document body and embedded links strongly suggest a phishing or scam attempt to lure users to potentially harmful websites. The presence of multiple redirector links indicates a deliberate effort to obscure the final destination and potentially deliver a secondary payload.

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/easy-ways-to-get-free-robux-game-hack In PDF document text
    • http://perpustakaan.idia.ac.id/repository/moon-active-games_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/coin-master-card-hack-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/coin-master-hack-pc-free_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/how-to-get-free-spins-on-coin-master-android_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/unlimited-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/coin-master-free-attack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/tiktok-free-like-website_GM835599320.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/can-you-get-free-tiktok-fans_GM835599320.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/wwwcoin-master-hack-game-download_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/win-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/free-minecraft-java-edition_GM479516143.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/is-minecraft-free-on-mac_GM479516143.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/coin-master-free-spins-link-2021-download_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/free-robux-please_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_off00005023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5023 26996 bytes
SHA-256: 5480f7d4111f03afa1d16359c2af7e277365ea4a66baa765e42d5176a02d69a6
font_01_sfnt_off00008d3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D3C 18724 bytes
SHA-256: ff2b5f5648817baecf5754646eae61914eefadf3856a555e8e6cbc13d6b08405

Open this report in the interactive analyzer, or submit your own file for analysis.