Malicious PDF — malware analysis report

Static analysis result for SHA-256 a406f57637f6af30…

MALICIOUS

PDF

34.8 KB Created: 2021-07-07 20:57:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 0e1b6d9809d031d87add8a674aab8e9a SHA-1: 38ea279de6d9c6abc9d2e15e3562c513c8a29463 SHA-256: a406f57637f6af30ba05a55378c2202b88c881b8663f603d0a0ddb99796c6b53
102 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, many of which are SEO-optimized PDFs related to game hacks and free currency for popular games like Roblox and Coin Master. The presence of a 'download button' heuristic and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content. The primary URL http://netcdn.tw/app/431946152/free-robux-no-verification-2021-android-game-hack is likely the final destination for a payload download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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/431946152/free-robux-no-verification-2021-android-game-hack
    • https://digilib.stimlog.ac.id/repository/how-do-you-hack-roblox-accounts-2021_GM431946152.pdf
    • https://digilib.stimlog.ac.id/repository/coin-master-links-free-spins_GM406889139.pdf
    • https://digilib.stimlog.ac.id/repository/hack-my-account-password-roblox_GM431946152.pdf
    • https://digilib.stimlog.ac.id/repository/free-roblox-download-for-chromebook_GM431946152.pdf
    • https://digilib.stimlog.ac.id/repository/coin-master-redeem-code-free_GM406889139.pdf
    • https://digilib.stimlog.ac.id/repository/how-many-levels-are-in-coin-master_GM406889139.pdf
    • https://digilib.stimlog.ac.id/repository/roblox-cheat-xbox-one_GM431946152.pdf
    • https://digilib.stimlog.ac.id/repository/free-coin-master-gifts_GM406889139.pdf
    • https://digilib.stimlog.ac.id/repository/can-you-make-shirts-free-on-roblox_GM431946152.pdf
    • https://digilib.stimlog.ac.id/repository/how-to-buy-robux-for-free_GM431946152.pdf
    • https://digilib.stimlog.ac.id/repository/free-robux-ad_GM431946152.pdf
    • https://digilib.stimlog.ac.id/repository/hack-para-counter-blox-roblox_GM431946152.pdf
    • http://digilib.stimlog.ac.id/repository/roblox-free-roblox_GM431946152.pdf
    • https://digilib.stimlog.ac.id/repository/free-admin-roblox-map_GM431946152.pdf
    • http://digilib.stimlog.ac.id/repository/get-robux_GM431946152.pdf
    • https://digilib.stimlog.ac.id/repository/who-hacked-john-doe-roblox_GM431946152.pdf
    • http://digilib.stimlog.ac.id/repository/free-robux-no-survey_GM431946152.pdf
    • https://digilib.stimlog.ac.id/repository/redeem-roblox-item-free-codes-2021_GM431946152.pdf
    • https://digilib.stimlog.ac.id/repository/paste-hack-roblox_GM431946152.pdf
    • http://digilib.stimlog.ac.id/repository/is-it-possible-to-get-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003147.bin
b676e7b96e50a2506bda1f3112aa04226a2368f4887eb5355816c409e821be90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3147 21732 bytes
font_01_sfnt_off000060e1.bin
fddc38f60f29949e87a17df7f7945f6cf104ea1bd46a51d994ebbbbf43946b8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60E1 19648 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.