Malicious PDF — malware analysis report

Static analysis result for SHA-256 158463a659c7d400…

MALICIOUS

PDF

35.4 KB Created: 2021-07-03 18:55:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 9394865ce30f50820088b3309f826ee1 SHA-1: acb7948f923d86ee6bba558ad05026f39560dd2f SHA-256: 158463a659c7d400552a76739cdac467916a48053799eb0626c65353fd755f8f
102 Risk Score

Malware Insights

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

The PDF document contains numerous links to external resources, many of which are SEO-optimized and promise free in-game items or hacks for popular games. The primary URL, http://netcdn.tw/app/406889139/free-daily-spins-coin-master-2021-game-hack, likely serves as a landing page for a scam or malware download. The heuristic PDF_SEO_LINK_FARM indicates a large number of such links were embedded, suggesting a coordinated effort to drive traffic to potentially malicious sites.

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/406889139/free-daily-spins-coin-master-2021-game-hack
    • https://elearning.man2pontianak.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-verifying-2021_GM431946152.pdf
    • https://elearning.man2pontianak.sch.id/__statics/gudangsoal/files/free-shirt-templates-for-roblox-2021_GM431946152.pdf
    • https://elearning.man2pontianak.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdf
    • https://elearning.man2pontianak.sch.id/__statics/gudangsoal/files/roblox-mad-city-hack-script-download_GM431946152.pdf
    • https://elearning.man2pontianak.sch.id/__statics/gudangsoal/files/how-to-download-minecraft-hacks_GM479516143.pdf
    • https://elearning.man2pontianak.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master_GM406889139.pdf
    • https://elearning.man2pontianak.sch.id/__statics/gudangsoal/files/roblox-btool-command-without-hacks_GM431946152.pdf
    • https://elearning.man2pontianak.sch.id/__statics/gudangsoal/files/coin-master-hack-without-human-verification_GM406889139.pdf
    • https://elearning.man2pontianak.sch.id/__statics/gudangsoal/files/coin-master-link_GM406889139.pdf
    • https://elearning.man2pontianak.sch.id/__statics/gudangsoal/files/roblox-group-free-robux_GM431946152.pdf
    • https://elearning.man2pontianak.sch.id/__statics/gudangsoal/files/free-spins-coin-master-2021_GM406889139.pdf
    • https://elearning.man2pontianak.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-download-free_GM406889139.pdf
    • https://elearning.man2pontianak.sch.id/__statics/gudangsoal/files/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdf
    • https://elearning.man2pontianak.sch.id/__statics/gudangsoal/files/how-to-hack-in-roblox-to-get-free-robux_GM431946152.pdf
    • https://elearning.man2pontianak.sch.id/__statics/gudangsoal/files/coin-master-free-spins-app_GM406889139.pdf
    • https://elearning.man2pontianak.sch.id/__statics/gudangsoal/files/vuxvux-free-robux_GM431946152.pdf
    • https://elearning.man2pontianak.sch.id/__statics/gudangsoal/files/master-8-ball-pool-free-coins_GM406889139.pdf
    • https://elearning.man2pontianak.sch.id/__statics/gudangsoal/files/get-free-robux-generator_GM431946152.pdf
    • https://elearning.man2pontianak.sch.id/__statics/gudangsoal/files/factory-simulator-cheats-roblox_GM431946152.pdf
    • https://elearning.man2pontianak.sch.id/__statics/gudangsoal/files/best-free-minecraft-servers_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003269.bin
0b66f40824f71512fdd3412175fdabe3412bb1f42f7afd4ab7e7dc9e92c9e7c3		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3269 22716 bytes
font_01_sfnt_off0000657a.bin
bff5cd883eb4370b15e965f4fd1aca22479e39b86b51e1d2e4068a25e0992d6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x657A 19000 bytes

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