Malicious PDF — malware analysis report

Static analysis result for SHA-256 40b3ae89bc60ea6a…

MALICIOUS

PDF

35.2 KB Created: 2021-07-04 04:45:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 927ee7cf547c088578a3bdfd0f3d9f49 SHA-1: d5dab4950be7687fe66f103a13fdf7fcc9fac5dd SHA-256: 40b3ae89bc60ea6aaf562ac0bdef1aa3b2d8b000c9a2f26b38751b8146d67ae3
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/como-conseguir-monedas-infinitas-y-tiradas-de-coin-master-hack-game-hack PDF link annotation
    • https://allhimalayantreks.com/userfiles/files/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/master-8-ball-pool-free-coins_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/get-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/minecraft-dungeons-download-free_GM479516143.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/rich-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/microsoft-store-robux_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/roblox-get-free-robux-now_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coinmaster-gps-user-review-coinmaster-coin-master-hack-pagedemo-index_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-free-spins-and-coins-today_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-roblox-gift-card-codes-2021-december_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-2021-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/roblox-free-accessories_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/robux-generator-2021-free_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/rbl-gg-free-robux_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_off00003193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3193 23080 bytes
SHA-256: 2775e3e61a18759733d3c95a9d99b4130a72a7f6177520d63d6fd4bf1d2ea51e
font_01_sfnt_off00006547.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6547 18908 bytes
SHA-256: 22eea22e93e3a2ab8e7a2e6bfe46b3c4bbbdffc0ed3854b3ba75aeac54633c45

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