Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfc49dc67103525d…

MALICIOUS

PDF

44.8 KB Created: 2021-06-03 07:51:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: adcd08f965ed361a6a95440da3d57662 SHA-1: a3655fa98cc4c838255c20f4bac9638f1f2dabd3 SHA-256: cfc49dc67103525d86f97672defde3bfef291c1b9ee29eca622c6713efa51a81
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 0.9865

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 https://netcdn.online/app/406889139/free-daily-spin-coin-master-game-game-hack PDF link annotation
    • http://perpus.stfm.ac.id/repository/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/coin-master-hack-without-verification-ios_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-private-minecraft-server_GM479516143.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-robux-no-verification-required_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-daily-free-spins-blog_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/hack-to-protect-village-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/how-to-get-free-builders-club-on-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/minecraft-on-computer-free_GM479516143.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/rbx-sites_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/watch-videos-for-robux_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-homepage_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_off00005252.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5252 25384 bytes
SHA-256: b72238eac5fa1d4a1d1b21bf8f359cdb47bd4e68b72bb0caa752172a2c66c9ec
font_01_sfnt_off00008bee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BEE 18568 bytes
SHA-256: bfd1e8101d459247551dcdbdaef1be92b80677b1afc3c882b62bac5b198db3f9

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