Malicious PDF — malware analysis report

Static analysis result for SHA-256 630d5d8d7a48e6e2…

MALICIOUS

PDF

49.1 KB Created: 2021-06-13 19:14:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: aa776f628ae86aeebf9a7d41116e6650 SHA-1: e60af617c89c922f9daaa438170308de1d031b74 SHA-256: 630d5d8d7a48e6e2f4745b948345cff271497e4a49f19e75ad5a9e3262647379
142 Risk Score

Malware Insights

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

This PDF document exhibits malicious characteristics, including a fake CAPTCHA lure and a large number of embedded links pointing to game cheats and hacks. The ML classifier strongly flagged this PDF as malicious. The primary goal appears to be tricking users into clicking links that may lead to further compromise or unwanted software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9228

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.co/app/431946152/roblox-strucid-battle-royale-aimbot-hack-full-lua-game-hack PDF link annotation
    • http://io24.com.ar/images/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/adopt-me-roblox-cheat-codes-twitter_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/coin-master-hack-that-actually-works_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/free-robux-generator-20212021_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/what-is-the-cheat-t-get-robux_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/i-need-robux_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/how-to-get-a-free-dominus-in-roblox_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/how-to-hack-coin-master-using-es-filer_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/coin-master-free-spins-app-android_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/4-step-way-to-get-free-robux-2021-november_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/free-minecraft-videos_GM479516143.pdfIn PDF document text
    • http://io24.com.ar/images/how-to-be-a-hacker-in-roblox-on-ipad_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/how-many-villages-are-in-coin-master_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/how-to-get-free-robux-by-joining-group-no-buying_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/cheat-engine-for-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/coin-master-free-spins-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b1b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B1B 31976 bytes
SHA-256: 921989cb45b6262b0d9cced237b302f4a9c916ff15604ab353b1bd3a5001b611
font_01_sfnt_off0000911d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x911D 2820 bytes
SHA-256: 972979c3a46100cf5f8fd289bc6fbd2496ff75fec0e3f6753648c72ec6eba714
font_02_sfnt_off00009abc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9ABC 19324 bytes
SHA-256: 0972018612482b0f74ab1624e93513eed2287e41cb259fd253ea46b1b00119b8

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