Malicious PDF — malware analysis report

Static analysis result for SHA-256 a013470f3e57e6a6…

MALICIOUS

PDF

33.8 KB Created: 2021-07-05 10:57:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 1ad2e64943dac8df26e11a243822324b SHA-1: 66c51878ceae4135adaf90742b5d8d5524c2cd29 SHA-256: a013470f3e57e6a6405eb18fc9e10dd4b04ac822c1521abe0f91e6a978c60aac
122 Risk Score

Malware Insights

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

The PDF document contains a lure for game hacks and displays a fake CAPTCHA to trick users into clicking a link. This link, http://netcdn.tw/app/479516143/how-to-get-free-mods-in-minecraft-game-hack, likely leads to a site that attempts to exploit the user's browser or download further malicious content. The ML classifier strongly indicates maliciousness, and the overall pattern suggests a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/how-to-get-free-mods-in-minecraft-game-hack PDF link annotation
    • https://library.stikeswnpalu.ac.id/repository/exploit-engine-roblox-free_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/how-to-get-free-robux-without-waiting_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/how-to-make-a-shirt-on-roblox-2021-free_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/how-to-get-free-robux-using-inspect-element-2021_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/pokemon-go-free-150_GM1094591345.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-robux-hacks-legit-no-survey_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/bux-blast-free-robux_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-admin-hack-2021_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-kick-me-whon-i-cheat_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/robux-hack-that-isnt-fake_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-free-eminem-clothes_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/google-play-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-free-in-app-purchases_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-shirt-roblox-2021_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/get-free-robux-game_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-hack-no-virus_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/minecraft-free-demo_GM479516143.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-roblox-gea_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_off00002fa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FA4 22344 bytes
SHA-256: 268d9b6a153cf48e86afb5ca3dda64fdc4e0d2ce598aef2fc517fdc97aa7f76e
font_01_sfnt_off00006134.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6134 18336 bytes
SHA-256: 70b6f7d086f064c688a26537650d273c761baed84510a3b1aafdb5c6054c2f47

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