Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f9c542ec03b0c8e…

MALICIOUS

PDF

45.1 KB Created: 2021-06-02 10:32:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 97ed9635a2d5b00492ed911c14054e3f SHA-1: 25efed84cb25696d94751e0e834c13c26217bf5f SHA-256: 7f9c542ec03b0c8ec273cb60d935be1be2c458320b1e03c23cce08970250971b
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.xyz/app/431946152/leah-ashe-roblox-royale-high-how-to-get-free-things-game-hack PDF link annotation
    • http://armportal.co.uk/images/how-to-downgrade-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://armportal.co.uk/images/coin-master-hack-ios-no-verification_GM406889139.pdfIn PDF document text
    • http://armportal.co.uk/images/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • http://armportal.co.uk/images/tiktok-free-real-followers_GM835599320.pdfIn PDF document text
    • http://armportal.co.uk/images/how-to-get-free-airpods-tiktok_GM835599320.pdfIn PDF document text
    • http://armportal.co.uk/images/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://armportal.co.uk/images/coin-master-daily-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://armportal.co.uk/images/roblox-login-hack_GM431946152.pdfIn PDF document text
    • http://armportal.co.uk/images/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • http://armportal.co.uk/images/hack-coin-master-download-ios_GM406889139.pdfIn PDF document text
    • http://armportal.co.uk/images/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://armportal.co.uk/images/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://armportal.co.uk/images/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://armportal.co.uk/images/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://armportal.co.uk/images/links-to-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://armportal.co.uk/images/robux-free-com_GM431946152.pdfIn PDF document text
    • http://armportal.co.uk/images/free-robux-only-username_GM431946152.pdfIn PDF document text
    • http://armportal.co.uk/images/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • http://armportal.co.uk/images/free-minecraft-java-account_GM479516143.pdfIn PDF document text
    • http://armportal.co.uk/images/blox-fun-info_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
stream_004_off000050ed.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50ED 25520 bytes
SHA-256: 17988ce0a842f531f0db53248c1bf6e530ed88946bc191be658a32785c0701d4
font_01_sfnt_off00008b23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B23 19200 bytes
SHA-256: 40e3e10604d3a01f3120ec1ae83c26718c57a947c1ae4cd1972912542eb30bff

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