Malicious PDF — malware analysis report

Static analysis result for SHA-256 2553a8ce390e044e…

MALICIOUS

PDF

33.3 KB Created: 2021-07-19 15:51:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 9352160f4eb22382a4fcb9c4fd6296fa SHA-1: 923ebabf1ce80359158a9508ffafe4ddac3b8b15 SHA-256: 2553a8ce390e044e5bce1cf7e776121e99fb2fdd3744d1e6d4c81bd034ea6098
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 0.9942

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/coin-master-free-spins-link-2021-game-hack PDF link annotation
    • http://www.campiresine.it/images/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.campiresine.it/images/free-minecraft-accounts-reddit_GM479516143.pdfIn PDF document text
    • http://www.campiresine.it/images/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://www.campiresine.it/images/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://www.campiresine.it/images/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.campiresine.it/images/free-robux-co_GM431946152.pdfIn PDF document text
    • http://www.campiresine.it/images/free-tiktok-fans-no-verification_GM835599320.pdfIn PDF document text
    • http://www.campiresine.it/images/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • http://www.campiresine.it/images/play-minecraft-online-free_GM479516143.pdfIn PDF document text
    • http://www.campiresine.it/images/how-do-you-get-minecraft-for-free_GM479516143.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_off00002c43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C43 23064 bytes
SHA-256: f44547b7c49b0d216089d5c5c179d98babf892f42837c051abcc037815f44680
font_01_sfnt_off00005fa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA8 18456 bytes
SHA-256: 405c435adaafa0da304b7a4986d8f56c56dc87ed278d5cff2ac0c57977d8d7e3

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