Malicious PDF — malware analysis report

Static analysis result for SHA-256 42a76bec40e75108…

MALICIOUS

PDF

34.9 KB Created: 2021-07-03 19:15:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c71bf2d7ce0dda973134517953fa0ca2 SHA-1: 167ea3af526d8de36c10951f6419dc99c35e6935 SHA-256: 42a76bec40e75108878d78e31ebf5501f76c609401e31574a00b7ed8ce605a3a
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/431946152/free-robux-just-enter-username-game-hack PDF link annotation
    • https://ezgolfer.com.tw/image/data/files/free-roblox-private-server-links_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/coin-master-online-hack-download_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/get-free-robux_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/earn-robux-websites_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-roblox-hack_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/robux-free-roblox-generator_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/which-games-on-roblox-you-should-fly-hack-in_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/minecraft-reach-hack_GM479516143.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-pet-food-coin-master_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/comment-avoir-des-robux-sans-payer-sans-hack_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-robux-gameswithout-password_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/minecraft-online-free-download_GM479516143.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/instagram-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/cmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/roblox-how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3096 22476 bytes
SHA-256: 898283d5bddb8b9c94c846f861c1da372f83880c363c62b2ff05075fe0bf8ca9
font_01_sfnt_off000062c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62C4 19244 bytes
SHA-256: bb42f0e36b7288fba8af59efb142b286361a630cbb1699ef387bab73f1413400

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