Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfced3f4999d5b94…

MALICIOUS

PDF

34.9 KB Created: 2021-06-27 22:04:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 2e0a5a40c8fcb99dd9c48fcf705cdeb5 SHA-1: a93ef22718d7fa1928a126ca016fab83598e4a1a SHA-256: dfced3f4999d5b94efa1d72ac514320daa9e23353df1bcb1a9293505d34b9d35
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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/free-2021-robux-no-verification-game-hack PDF link annotation
    • http://digilib.ulm.ac.id/pusat/repository/how-to-hack-roblox-on-computer_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-level-7-exploit-free_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/ways-to-earn-robux_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-links-to-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-minecraft-bedrock-server_GM479516143.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/casper-hack-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/c-rex-hack-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-game-free-spin-download_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/hitbox-hack-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/code-for-free-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-hack-blog_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-hack-version-download-2021-ios_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/tiktok-free-2021-views_GM835599320.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/real-working-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-game-hunter_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_off00002ede.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EDE 22752 bytes
SHA-256: 686b609c9e0a0587d41104774722c3a16c6001c81706b9b91a8399a6d049c9d8
font_01_sfnt_off000061cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61CC 19476 bytes
SHA-256: 656113c49a539097d32df4ed77364cded41a3507ec8d0ac589a7e4485f9ca417

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