Malicious PDF — malware analysis report

Static analysis result for SHA-256 c28f48b114e8f40f…

MALICIOUS

PDF

41.2 KB Created: 2021-05-01 16:15:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: de21f8bcaffbb2060f004bb2f6d88081 SHA-1: c519b389ae267e02c8ce03f8747dbdfbf31968f0 SHA-256: c28f48b114e8f40fdc570c2e4232e422e2ea80807682dca41bf8b09071313354
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, masquerading as game hacks or generators. The document body and heuristics indicate a lure to exploit user interest in free in-game currency or cheats. While no scripts were directly extracted, the PDF structure and embedded links suggest a phishing or redirection attack, likely leading to further malware download or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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.xyz/app/431946152/free-robux-codes-generator-works-game-hack In PDF document text
    • https://lib.stie-yai.ac.id/repository/noclip-hack-download-for-roblox.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/cheat-engine-roblox-2021.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-coins-in-roblox-rb-world-2.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/how-to-get-titan-hacks-in-roblox.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/sites-robux-free.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-robux-meme.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/roblox-jailbreak-free-exploit.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-roblox-followers-generator-2021.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/websites-that-will-give-you-free-robux.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/roblox-hack-client-mac.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_003_off000041c3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x41C3 26160 bytes
SHA-256: fac46e7876f532061a36079ca18a434eccc825af99ba0047d7a4a3953161f24a
font_01_sfnt_off00007d7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D7D 18888 bytes
SHA-256: ec456c33b3cb80b3269e0b8ecf85c24320a5a03485d9c6db959add6eb42859c9