Malicious PDF — malware analysis report

Static analysis result for SHA-256 6197cb42a0b94bf8…

MALICIOUS

PDF

43.2 KB Created: 2021-05-12 17:39:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 8a958ed10f49186c498aac41b2233f93 SHA-1: 0cdcf2855251ea9c92b56a950c42d9d4c2496b3d SHA-256: 6197cb42a0b94bf8be8f2c9c308955256d198cfd341265e20d834651cb99ca56
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains a large number of external links, many of which are related to free game items and hacks, indicating a link farm or phishing attempt. The ML classifier also flagged this PDF as malicious with high confidence. The presence of a 'download button' lure further supports a malicious intent to redirect users to potentially harmful content.

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-games-to-play-for-free-game-hack
    • https://elma.mtsn10jakarta.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins-daily_GM406889139.pdf
    • https://elma.mtsn10jakarta.sch.id/__statics/gudangsoal/files/earn-free-robux_GM431946152.pdf
    • https://elma.mtsn10jakarta.sch.id/__statics/gudangsoal/files/coin-master-daily-spin-free_GM406889139.pdf
    • https://elma.mtsn10jakarta.sch.id/__statics/gudangsoal/files/coin-master-free-soins_GM406889139.pdf
    • https://elma.mtsn10jakarta.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-link-facebook_GM406889139.pdf
    • https://elma.mtsn10jakarta.sch.id/__statics/gudangsoal/files/how-to-make-a-minecraft-server-for-free-java_GM479516143.pdf
    • https://elma.mtsn10jakarta.sch.id/__statics/gudangsoal/files/hack-avatar_GM431946152.pdf
    • https://elma.mtsn10jakarta.sch.id/__statics/gudangsoal/files/coin-master-free-spins-2021_GM406889139.pdf
    • https://elma.mtsn10jakarta.sch.id/__statics/gudangsoal/files/coin-master-35-13-hack-download_GM406889139.pdf
    • https://elma.mtsn10jakarta.sch.id/__statics/gudangsoal/files/can-you-actually-get-free-robux_GM431946152.pdf
    • https://elma.mtsn10jakarta.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdf
    • https://elma.mtsn10jakarta.sch.id/__statics/gudangsoal/files/coin-master-hack-without-verify_GM406889139.pdf
    • https://elma.mtsn10jakarta.sch.id/__statics/gudangsoal/files/get-free-robux-generator_GM431946152.pdf
    • https://elma.mtsn10jakarta.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-ipad_GM431946152.pdf
    • https://elma.mtsn10jakarta.sch.id/__statics/gudangsoal/files/coin-master-cheats-free-spins_GM406889139.pdf
    • https://elma.mtsn10jakarta.sch.id/__statics/gudangsoal/files/how-do-i-get-free-robux-on-roblox_GM431946152.pdf
    • https://elma.mtsn10jakarta.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-accounts-for-robux_GM431946152.pdf
    • https://elma.mtsn10jakarta.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-daily_GM406889139.pdf
    • https://elma.mtsn10jakarta.sch.id/__statics/gudangsoal/files/hacks-for-roblox-prison-life_GM431946152.pdf
    • https://elma.mtsn10jakarta.sch.id/__statics/gudangsoal/files/bloxawards-com-earn-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c04.bin
76b596a8ffc4a49a9b7b1d68d7f70424e70f055d75ebea6f23fe8088e1ae43f7		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C04 24964 bytes
font_01_sfnt_off00008544.bin
ab23d1b79a91ba718332cf6cb35a2d4f002a60c6040c891a5ecca9d58b4dd5b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8544 18768 bytes

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