Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e1a1c5fe91963c7…

MALICIOUS

PDF

43.5 KB Created: 2021-05-12 04:07:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 54d0bf83d978bfc3e62ab3b6b7c55fb4 SHA-1: e8a8cad7ce31253f19954a474f440636de3210f0 SHA-256: 4e1a1c5fe91963c78902068864e93633d3ae04b05424ed9370e679fdcb879f9e
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, identified as a link farm, that direct users to external websites offering game hacks and cheats. The presence of a 'download button' heuristic and the ML classifier's high confidence score indicate a malicious intent to trick users into downloading further content. The document's content and structure strongly suggest a phishing or social engineering attack aimed at distributing malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/roblox-prison-life-hack-game-hack
    • https://mialfalahkanigoroblitar.sch.id/__statics/gudangsoal/files/how-to-earn-robux-for-free-2021_GM431946152.pdf
    • https://mialfalahkanigoroblitar.sch.id/__statics/gudangsoal/files/how-do-you-get-free-roblox_GM431946152.pdf
    • https://mialfalahkanigoroblitar.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins-hack_GM406889139.pdf
    • https://mialfalahkanigoroblitar.sch.id/__statics/gudangsoal/files/daily-coin-master-free-spins_GM406889139.pdf
    • https://mialfalahkanigoroblitar.sch.id/__statics/gudangsoal/files/how-do-i-get-free-coins-on-coin-master_GM406889139.pdf
    • https://mialfalahkanigoroblitar.sch.id/__statics/gudangsoal/files/how-do-i-get-robux-on-roblox_GM431946152.pdf
    • https://mialfalahkanigoroblitar.sch.id/__statics/gudangsoal/files/free-spins-coin-master-links_GM406889139.pdf
    • https://mialfalahkanigoroblitar.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-link-today-2021_GM406889139.pdf
    • https://mialfalahkanigoroblitar.sch.id/__statics/gudangsoal/files/collect-free-spins-for-coin-master_GM406889139.pdf
    • https://mialfalahkanigoroblitar.sch.id/__statics/gudangsoal/files/coin-master-level-4_GM406889139.pdf
    • https://mialfalahkanigoroblitar.sch.id/__statics/gudangsoal/files/how-to-get-free-coins-on-coin-master_GM406889139.pdf
    • https://mialfalahkanigoroblitar.sch.id/__statics/gudangsoal/files/blogger-coin-master-free-spins_GM406889139.pdf
    • https://mialfalahkanigoroblitar.sch.id/__statics/gudangsoal/files/free-spins-coin-master-daily_GM406889139.pdf
    • https://mialfalahkanigoroblitar.sch.id/__statics/gudangsoal/files/hackear-coin-master-sin-root_GM406889139.pdf
    • https://mialfalahkanigoroblitar.sch.id/__statics/gudangsoal/files/como-hackear-coin-master-gratis_GM406889139.pdf
    • https://mialfalahkanigoroblitar.sch.id/__statics/gudangsoal/files/free-robux-real-2021_GM431946152.pdf
    • https://mialfalahkanigoroblitar.sch.id/__statics/gudangsoal/files/https-rbx-place-rewards_GM431946152.pdf
    • https://mialfalahkanigoroblitar.sch.id/__statics/gudangsoal/files/free-robux-for-kids_GM431946152.pdf
    • https://mialfalahkanigoroblitar.sch.id/__statics/gudangsoal/files/free-robux-hack_GM431946152.pdf
    • https://mialfalahkanigoroblitar.sch.id/__statics/gudangsoal/files/give-me-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_off00004775.bin
d496c2989578e4a32e75bef2200d2b8904c21ad423957f8d2f5eaba14f22c90f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4775 29324 bytes
font_01_sfnt_off00008752.bin
407d6fb8d9efb45a2b1cddcfd151d3a069902e857cdd2d484da7c19786549282		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8752 18456 bytes

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