Malicious PDF — malware analysis report

Static analysis result for SHA-256 6df4e99d90e45e22…

MALICIOUS

PDF

42.4 KB Created: 2021-05-15 03:13:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e8175a53dc1f4a826b649cc60d8a8388 SHA-1: 446fc2c352c43bcdac1fc9d19da492b3b02c9aff SHA-256: 6df4e99d90e45e22784a18fa55d7dfcb31a47339ad285ae2001b19eec7c6dba9
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document employs a fake CAPTCHA lure to trick users into clicking a malicious link, disguised as a game hack generator. The embedded URL leads to a suspicious domain, likely serving as a redirector or hosting a secondary payload. While no scripts were explicitly extracted, the PDF structure and heuristics suggest an attempt to exploit user interaction for malicious purposes, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/431946152/real-roblox-game-hack PDF link annotation
    • https://elearning.man5bojonegoro.com/__statics/gudangsoal/files/coin-master-hack-account_GM406889139.pdfIn PDF document text
    • https://elearning.man5bojonegoro.com/__statics/gudangsoal/files/coin-master-hack_GM406889139.pdfIn PDF document text
    • https://elearning.man5bojonegoro.com/__statics/gudangsoal/files/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.man5bojonegoro.com/__statics/gudangsoal/files/coin-master-hack-tool-apk-download_GM406889139.pdfIn PDF document text
    • https://elearning.man5bojonegoro.com/__statics/gudangsoal/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://elearning.man5bojonegoro.com/__statics/gudangsoal/files/minecraft-hacks-pc_GM479516143.pdfIn PDF document text
    • https://elearning.man5bojonegoro.com/__statics/gudangsoal/files/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.man5bojonegoro.com/__statics/gudangsoal/files/how-to-gain-more-spins-on-coin-master-for-free_GM406889139.pdfIn PDF document text
    • https://elearning.man5bojonegoro.com/__statics/gudangsoal/files/coin-master-free-chip_GM406889139.pdfIn PDF document text
    • https://elearning.man5bojonegoro.com/__statics/gudangsoal/files/free-unlimited-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.man5bojonegoro.com/__statics/gudangsoal/files/free-money-links-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.man5bojonegoro.com/__statics/gudangsoal/files/robloxbux-us-generator_GM431946152.pdfIn PDF document text
    • https://elearning.man5bojonegoro.com/__statics/gudangsoal/files/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.man5bojonegoro.com/__statics/gudangsoal/files/hack-de-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.man5bojonegoro.com/__statics/gudangsoal/files/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://elearning.man5bojonegoro.com/__statics/gudangsoal/files/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.man5bojonegoro.com/__statics/gudangsoal/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://elearning.man5bojonegoro.com/__statics/gudangsoal/files/oprewards-com-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.man5bojonegoro.com/__statics/gudangsoal/files/toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • https://elearning.man5bojonegoro.com/__statics/gudangsoal/files/coin-master-hack-apk-download-for-android-mobile_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
stream_003_off00004a44.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A44 25920 bytes
SHA-256: b4b3d8e01716f1bba09bdc2ed32561f561879a99249c1f3fef64291e80d4d34d
font_01_sfnt_off00008434.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8434 18012 bytes
SHA-256: fe6948f8d9aae314f4e598887823c268b1dd75a45433b0d72710ef933c851efb

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