Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e353b83b5040463…

MALICIOUS

PDF

42.7 KB Created: 2021-05-17 14:00:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: af77d9b1c7d012068eb0fc1e4055e539 SHA-1: 6ba696eb877e3ecd63dee989ecd9a222e12d89ae SHA-256: 4e353b83b50404637705ed09a899122045de94cc85a6d75fd415f92d13148b27
102 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, identified as a 'PDF_SEO_LINK_FARM', pointing to websites offering game hacks and free in-game currency. The ML classifier also flagged this PDF as malicious with high confidence. The presence of a 'download button' heuristic further suggests a user-interaction-based lure to navigate to these potentially malicious external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/431946152/who-to-get-free-robux-game-hack
    • http://boliviagasenergia.com/images/coin-master-free-coins-and-spins-daily_GM406889139.pdf
    • http://boliviagasenergia.com/images/buxblast-com-robux_GM431946152.pdf
    • http://boliviagasenergia.com/images/moonactive-coin-master-hack_GM406889139.pdf
    • http://boliviagasenergia.com/images/freecoins_GM406889139.pdf
    • http://boliviagasenergia.com/images/how-to-hack-someones-account-on-roblox_GM431946152.pdf
    • http://boliviagasenergia.com/images/coin-master-free-attack-link_GM406889139.pdf
    • http://boliviagasenergia.com/images/how-to-get-free-coins-in-coin-master_GM406889139.pdf
    • http://boliviagasenergia.com/images/coin-master-free-spins-link-today-hack_GM406889139.pdf
    • http://boliviagasenergia.com/images/roblox-com-free-robux_GM431946152.pdf
    • http://boliviagasenergia.com/images/coin-master-free-spins-app-android_GM406889139.pdf
    • http://boliviagasenergia.com/images/coin-master-32-android-mod-hack-apk-download_GM406889139.pdf
    • http://boliviagasenergia.com/images/free-spins-on-coin-master-link_GM406889139.pdf
    • http://boliviagasenergia.com/images/how-to-get-free-robux-without-downloading-anything_GM431946152.pdf
    • http://boliviagasenergia.com/images/free-robux-link_GM431946152.pdf
    • http://boliviagasenergia.com/images/coin-master-hack-without-verification-code_GM406889139.pdf
    • http://boliviagasenergia.com/images/is-roblox-free-on-pc_GM431946152.pdf
    • http://boliviagasenergia.com/images/roblox-rewards-site_GM431946152.pdf
    • http://boliviagasenergia.com/images/coin-master-free-spins-2021_GM406889139.pdf
    • http://boliviagasenergia.com/images/coin-master-free-coin-hack_GM406889139.pdf
    • http://boliviagasenergia.com/images/roblox-games-with-free-radio_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a6c.bin
791edca36f3a14b633459f8ce24b89be3234b7ede8c0fcc2d1ec4f34b6889cd1
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A6C 25404 bytes
font_01_sfnt_off000083f6.bin
7ba6f7de64c6d8ae6f5469fb20d9bd46bb355649f5c0a9ce8a2cee34149577d7
pdf-font-stream PDF embedded font (sfnt) at offset 0x83F6 18484 bytes