Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1c48c4df0fcc48f…

MALICIOUS

PDF

34.7 KB Created: 2021-07-07 06:12:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: eb11774a4e7d68e8f905f757590bd857 SHA-1: d8140b2f3c021a9e2c4a430b682530a3abab48ac SHA-256: b1c48c4df0fcc48f8b02c14f4eb8e399e0e84b8d2b8be4b03b18b8b7f571e80a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a prominent link to a website offering game hacks and free currency, which is a common lure for phishing or malware distribution. The ML classifier strongly flagged this PDF as malicious, and the presence of multiple URLs associated with game exploits reinforces this assessment. No scripts were extracted, but the document's structure and embedded links suggest it's designed to redirect users to potentially harmful content.

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/get-free-spins-on-coin-master-links-game-hack PDF link annotation
    • https://goodtools.tw/upload/files/roblox-corruption-hack-download_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-codes-for-roblox-case-clicker_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-promo-codes-roblox_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-coin-spin_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-hack-into-a-roblox-players-login_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-get-sentry-in-all-out-zombies-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-get-robux-without-paying-or-hacking_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-do-you-get-roblox-money_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/dbor-roblox-hack_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/generation-for-free-robux_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/snapes-free-download-roblox_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-get-java-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://goodtools.tw/upload/files/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/roblox-robux-hack-february-2021-pastebin_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/roblox-download-free-on-ps4_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-card-link-coin-master_GM406889139.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_off000031b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31B1 22856 bytes
SHA-256: dfd8454a6b27b43234905220a40894d2c4db8ac394baacdbc9f67efe9ef1e700
font_01_sfnt_off000064ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64EF 18344 bytes
SHA-256: cef811730d3c89c62d8bd0bdba973cc660337c4c6b1ed159a44d3fc940f5033b

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