Malicious PDF — malware analysis report

Static analysis result for SHA-256 c811964962593309…

MALICIOUS

PDF

33.5 KB Created: 2021-07-05 18:54:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b6a7af1a5b0004c8b105cbb7da2007da SHA-1: 2976ff6fd374a0f15f94ad7168a82eedd890d13c SHA-256: c811964962593309a24b10c90352c8306c83bde82c1256ef1bbbd8d690885875
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/479516143/free-minecraft-client-game-hack PDF link annotation
    • http://www.stttekstil.ac.id/elib/repository/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/sb-game-hacker-coin-master_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-card-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-shields-coin-master_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/coin-master-hack-version_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/chaos-washers-on-roblox-is-getting-hacked_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-robux-mod_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-gamepass-roblox-script-not-patched_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/minecraft-name-tag-hacks_GM479516143.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-roblox-card-codes-july-2021_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/robux-hack-911-pastbin_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-robux-generator-no-survey-or-human-verification-2021-pc_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/cheat-roblox-pc-phantom-forces_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-robux-viseo-not-clickbait-2021_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-trades-roblox_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/blox-land-robux-free_GM431946152.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_off000031c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31C9 21772 bytes
SHA-256: edd79af13cd3ac14f33eb4f6cdb5f2c216aeb99dbab5dc36af88927d4b2f0cad
font_01_sfnt_off0000616e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x616E 17928 bytes
SHA-256: 06737be40afdd7807bcb221f1242e15b3899983b357bc9904bb842239db889be

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