Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0f51b81e3bce355…

MALICIOUS

PDF

35.4 KB Created: 2021-07-04 03:16:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 80bd7d4428ea7ac03cbc7fb4bb5262cc SHA-1: 3a78a105e34b98ae7c831576bb12284c486fc3c9 SHA-256: a0f51b81e3bce35541a47a607f7de0f795129ad6eea887b6b53b5e51ca9a72ac
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/moonactive-free-spins-link-game-hack PDF link annotation
    • https://www.wearmyspex.com/uploaded_files/userfiles/files/coin-master-free-download-app_GM406889139.pdfIn PDF document text
    • https://www.wearmyspex.com/uploaded_files/userfiles/files/how-many-levels-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.wearmyspex.com/uploaded_files/userfiles/files/como-hackear-robux-facil-y-rapido-2021_GM431946152.pdfIn PDF document text
    • https://www.wearmyspex.com/uploaded_files/userfiles/files/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • https://www.wearmyspex.com/uploaded_files/userfiles/files/free-robux-earn_GM431946152.pdfIn PDF document text
    • https://www.wearmyspex.com/uploaded_files/userfiles/files/coin-master-hack-here_GM406889139.pdfIn PDF document text
    • https://www.wearmyspex.com/uploaded_files/userfiles/files/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • https://www.wearmyspex.com/uploaded_files/userfiles/files/how-to-hack-roblox-ac-counts_GM431946152.pdfIn PDF document text
    • https://www.wearmyspex.com/uploaded_files/userfiles/files/free-vip-roblox_GM431946152.pdfIn PDF document text
    • https://www.wearmyspex.com/uploaded_files/userfiles/files/free-roblox-accounts-with-robux-and-obc-2021_GM431946152.pdfIn PDF document text
    • https://www.wearmyspex.com/uploaded_files/userfiles/files/free-robux-gift-card-codes-pastebin_GM431946152.pdfIn PDF document text
    • https://www.wearmyspex.com/uploaded_files/userfiles/files/hacks-roblox_GM431946152.pdfIn PDF document text
    • https://www.wearmyspex.com/uploaded_files/userfiles/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.wearmyspex.com/uploaded_files/userfiles/files/dll-file-cheats-on-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.wearmyspex.com/uploaded_files/userfiles/files/adopt-me-roblox-hack-script_GM431946152.pdfIn PDF document text
    • https://www.wearmyspex.com/uploaded_files/userfiles/files/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • https://www.wearmyspex.com/uploaded_files/userfiles/files/free-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.wearmyspex.com/uploaded_files/userfiles/files/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • https://www.wearmyspex.com/uploaded_files/userfiles/files/free-robux-2021-unlimited-codes-for-kids_GM431946152.pdfIn PDF document text
    • https://www.wearmyspex.com/uploaded_files/userfiles/files/roblox-zone-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_off00003333.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3333 23084 bytes
SHA-256: 7528654e1d633f612973d0fba6e3bd227bf78c40866a904ad3138ebdf2d8cf9e
font_01_sfnt_off0000670e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x670E 18460 bytes
SHA-256: 8e27bc3ea3f62741a2ad6ac39f6be034d140b49cb90253f8adcdccfecdbeaab1