Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb7535da2c765aa3…

MALICIOUS

PDF

33.1 KB Created: 2021-07-04 02:57:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 378dbbc934e05055b3e73934fb37add7 SHA-1: ad4f7902b69c199a75a9e89e20e21b4fead853a7 SHA-256: eb7535da2c765aa344544bfc409737ea56c60fa054ebd0fe10df5fea85f9780a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a prominent link disguised as a lure for 'free mods for Minecraft PE' and 'game hack' generators. This link, http://netcdn.tw/app/479516143/free-mods-for-minecraft-pe-game-hack, redirects to a suspicious domain, indicating a likely attempt to deliver a malicious payload. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is part of a phishing or malware distribution scheme.

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/479516143/free-mods-for-minecraft-pe-game-hack PDF link annotation
    • 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/is-free-robux-real_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/hacks-for-robux-fast-2021_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/roblox-builders-club-free-2021_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/roblox-free-draw_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-roblox-groups-with-funds_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/how-to-get-minecraft-for-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/how-to-give-robux-on-mobile_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/get-free-robux-202120212021202120212021202120212021000-b_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/roblox-hack-glitch_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/hack-injector-roblox_GM431946152.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/coin-master-hack-2021-download_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/www-roblox-com-cheat-in_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/como-hackear-roblox-pushing_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/robux-hack-2021-no-verification_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-1b-robux_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-robux-com-roblox_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_off00002f06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F06 21808 bytes
SHA-256: 7728fbb7d8beb884b19ff3a09323db2c4199dae32906079911615bbaa1aa921a
font_01_sfnt_off00005e62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E62 18324 bytes
SHA-256: 6654eaae5534462051d4d15c9b2a2db406e5011fb4f6a93ce1582a2079ce45bc

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