Malicious PDF — malware analysis report

Static analysis result for SHA-256 238f6df3bee7edc5…

MALICIOUS

PDF

47.8 KB Created: 2021-06-03 06:09:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: f9c4aa4fb713cc2148c77d139c804de2 SHA-1: 4a97c88dfdd71d1414776f357b581bd03ba13e2e SHA-256: 238f6df3bee7edc542dd80f736384d11d21fc7ab82bf6975ae08ec21e715f445
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links that redirect to websites offering game hacks and generators, a common lure for phishing or malware distribution. The ML classifier also flagged this PDF as malicious. The primary malicious URL identified is https://netcdn.online/app/431946152/real-roblox-game-hack, which likely serves as the initial landing page for the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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/real-roblox-game-hack In PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/coin-master-hack-online-without-human-verification_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/free-admin-roblox-map_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/roblox-adopt-me-hack_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/hack-client_GM479516143.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/pokemon-go-free-12k-eggs_GM1094591345.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/android-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/coin-master-2021-free-spins-link_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/coin-master-hack-tool-india_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/roblox-robux-generator-tool_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/free-minecraft-accounts-2021_GM479516143.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/free-spins-promo-code-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/free-robux-obby_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/tiktok-download-free-jio-phone_GM835599320.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/the-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/free-executors-for-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/pokemon-go-free-level-40-account_GM1094591345.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/free-robux-generator-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/100-hack-coin-master_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_off0000506c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x506C 33468 bytes
SHA-256: c4046bf5a41115b1c14094488568544acb937194fc5b110318bb7158af3efd3a
font_01_sfnt_off0000994e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x994E 18012 bytes
SHA-256: fe6948f8d9aae314f4e598887823c268b1dd75a45433b0d72710ef933c851efb

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