Malicious PDF — malware analysis report

Static analysis result for SHA-256 191a157a2916e8d2…

MALICIOUS

PDF

35.3 KB Created: 2021-07-05 23:20:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 475132ce546b5093f1bf5909238434d7 SHA-1: c1b47fc4d8bf100e05bd16456786b7bf3ae4cb0c SHA-256: 191a157a2916e8d2c174df58649cbd84578ae9480f47c3d1fc432b9697dcacaf
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.tw/app/406889139/haktuts-free-spins-game-hack PDF link annotation
    • http://library.stieyapan.ac.id//repository/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/pubg-770-uc-hack_GM1330123889.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-hack-unlimited-spins-and-coins-cheats_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/moonactive-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/hack-coin-master-apk-31_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/getrobux-now_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-free-coins-facebook_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/grabpoints-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-hack-version-2021-download_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-many-levels-does-coin-master-have_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-daily-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/hack-script-roblox-game-servers_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-heaven-links_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/www-coinmaster_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_off0000328c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x328C 23352 bytes
SHA-256: 914356b137dec91a0ff8daccc0433ee26415140fd69e999d97c1a6be0f52cc26
font_01_sfnt_off0000674c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x674C 18340 bytes
SHA-256: 9dbf43f503ac48c00fbf642e157e843421771d3f6a8b21dba3c9405ee413bcf3

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