Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffe2313710ba8c17…

MALICIOUS

PDF

34.4 KB Created: 2021-06-18 08:27:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 5544c3f9e11ceb6e8a1e7cb3c9aead0f SHA-1: 5322c9e901545e3afc03f7632d29fa1289e6a722 SHA-256: ffe2313710ba8c175d898bad8ed9e0cc9df1555e63b2d75641e204c60f52758d
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF document contains numerous links disguised as game hacks and generators for popular games like Roblox and Coin Master. The primary heuristic, 'PDF_GAME_HACK_REDIRECT_LURE', indicates these links lead to redirectors, and the 'PDF_SEO_LINK_FARM' heuristic suggests a large number of such links are present. The ML classifier also strongly flagged this PDF as malicious. The document body reinforces this by containing phrases like 'how-to-get-free-bloxbux-on-bloxburg-roblox-game-hack' and numerous related URLs, indicating a lure to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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-get-free-bloxbux-on-bloxburg-roblox-game-hack PDF link annotation
    • https://perpustakaan.stiq-amuntai.ac.id/repository/robux-download_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stiq-amuntai.ac.id/repository/how-to-hack-coin-master-using-es-file_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stiq-amuntai.ac.id/repository/roblox-speed-hack-without-cheat-engine-dll_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stiq-amuntai.ac.id/repository/free-robux-apk_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stiq-amuntai.ac.id/repository/play-roblox-for-free-on-google_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stiq-amuntai.ac.id/repository/how-to-get-free-premium-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stiq-amuntai.ac.id/repository/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stiq-amuntai.ac.id/repository/free-gold-cards-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stiq-amuntai.ac.id/repository/get-free-tiktok-followers-no-verification_GM835599320.pdfIn PDF document text
    • https://perpustakaan.stiq-amuntai.ac.id/repository/roblox-got-talent-piano-hack_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stiq-amuntai.ac.id/repository/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stiq-amuntai.ac.id/repository/coin-master-app-free-download_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stiq-amuntai.ac.id/repository/coin-master-free-spins-link-hack_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stiq-amuntai.ac.id/repository/los-mejores-hacks-para-roblox-cheskoo_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stiq-amuntai.ac.id/repository/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stiq-amuntai.ac.id/repository/free-accounts-from-2021-with-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stiq-amuntai.ac.id/repository/how-to-get-free-robux-and-obc-by-xdaniel_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stiq-amuntai.ac.id/repository/roblox-account-hacker-tool_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stiq-amuntai.ac.id/repository/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stiq-amuntai.ac.id/repository/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EA4 22552 bytes
SHA-256: 51e4c68831026d340c7fab972266e5ed3cb7e98f52c3307e25af136f0a812036
font_01_sfnt_off00006122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6122 19056 bytes
SHA-256: ab24d92ba788ae0b8a4c470317265803b845e29c2baa2d0a2a8edf6cbc35e333

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