Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb388de3d26d4e28…

MALICIOUS

PDF

44.8 KB Created: 2021-06-09 08:16:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e9c2b127956dda9c48faeab7b261b5b5 SHA-1: 6cc7654bea7653594643c0299dbc168720b70fb9 SHA-256: fb388de3d26d4e28d6e641970b0bc8c4b295b7a795e84d467177f45e933eaa04
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to a known malicious domain, masquerading as a free generator for game items. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or redirection attack aimed at tricking users into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/roblox-profile-picture-free-game-hack In PDF document text
    • http://digilib-ppsunisma.ac.id/repository/10-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-movement-hacks_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-to-download-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/play-minecraft-online-free_GM479516143.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/coin-master-hack-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-games-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/minecraft-windows-10-edition-free-with-java_GM479516143.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-hack-scripts-pastebin_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-robux-2021-december_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/mine-minecraft-games-for-free_GM479516143.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/coin-master-daily-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-boombox-on-roblox-script_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/minecraft-svg-free_GM479516143.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-galaxy-arcade-resourcen-cheats_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/coin-master-hack-tool-without-verification_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_off00005023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5023 26476 bytes
SHA-256: b4a2469fc3882c0a5e478e3b50cdd52b3de09022e467bc11e7be652a4d4da180
font_01_sfnt_off00008c3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C3B 18464 bytes
SHA-256: 4368534fa184c987f1dce0304f559d990d53db81d82608870128c0740a9facc1

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