Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef1f3114c25cd0b4…

MALICIOUS

PDF

33.9 KB Created: 2021-07-03 18:01:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 8915cd1d1d42eee2f618edfb50bd8751 SHA-1: c8323d0f32571b8b60f8f55ae4729090d1e96553 SHA-256: ef1f3114c25cd0b4862ba9c67491daeac6f507f9aded682748a8596375a17183
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/village-3-coin-master-game-hack PDF link annotation
    • https://ezgolfer.com.tw/image/data/files/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/android-coin-master-3433-apk-hack_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/world-conquest-free-siterobloxcomgames_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/download-hacked-games-coin-master_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/latest-free-spin-coin-master-daily_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-robux-link_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-roblox-printables_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-roblox-avatar-ideas_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/roblox-mad-city-cheat-commands_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/minecraft-jar-free_GM479516143.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-spins-coin-master-no-survey_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/dont-take-damage-hack-roblox_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/20219-walk-speed-roblox-cheat_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/coin-master-free-spins-gratis_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/coin-master-free-coins-link-march-2021_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/robux-survey_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/descargar-coin-master-hackeado_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-robux-inspect-tool-needed_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_off0000308f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x308F 22216 bytes
SHA-256: 8b9bdf11520b41980cf106585fe9c1a8ac8d3ee2f536b4fc71bfda0583bf5df8
font_01_sfnt_off000061dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61DD 18216 bytes
SHA-256: 58e6ca71e80361c97c12faabc02ae8553130ffbaaef78b9f7fcf12d765986ed3

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