Malicious PDF — malware analysis report

Static analysis result for SHA-256 659b282410e129e2…

MALICIOUS

PDF

45.3 KB Created: 2021-05-13 01:33:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d317b63e27787943facf37be2ff8f6e4 SHA-1: 014c93fd1d4f7b9ce9f45b5d8927068189b2bf3b SHA-256: 659b282410e129e228993735141a0cf84475138f8209ad6624558ee7888bf394
102 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are disguised as legitimate resources for popular games, but likely lead to malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous SEO-optimized links suggests a link farm designed to distribute malware or phishing lures. The document body itself contains obfuscated text and URLs pointing to potential malware download 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 https://netcdn.xyz/app/431946152/robuxmatch.con-game-hack
    • http://nationshield.ae/userfiles/files/free-coin-master-spins-without-human-verification_GM406889139.pdf
    • http://nationshield.ae/userfiles/files/what-do-points-do-in-roblox_GM431946152.pdf
    • http://nationshield.ae/userfiles/files/coin-master-hack-8-ball-pool_GM406889139.pdf
    • http://nationshield.ae/userfiles/files/roblox-bloxburg-free-money_GM431946152.pdf
    • http://nationshield.ae/userfiles/files/www-bandicam-com-free-robux_GM431946152.pdf
    • http://nationshield.ae/userfiles/files/free-robux-codes-generator_GM431946152.pdf
    • http://nationshield.ae/userfiles/files/free-printable-roblox-coloring-pages_GM431946152.pdf
    • http://nationshield.ae/userfiles/files/free-robux-generator-no-human-verification-2021_GM431946152.pdf
    • http://nationshield.ae/userfiles/files/coin-master-heaven-free-spins-link-2021-today_GM406889139.pdf
    • http://nationshield.ae/userfiles/files/hack-coin-master-app-ios_GM406889139.pdf
    • http://nationshield.ae/userfiles/files/haktuts-coin-master-spins_GM406889139.pdf
    • http://nationshield.ae/userfiles/files/roblox-lovenet_GM431946152.pdf
    • http://nationshield.ae/userfiles/files/coin-master-free-spins-2021-link_GM406889139.pdf
    • http://nationshield.ae/userfiles/files/coin-master-hack-without-human-verification-2021_GM406889139.pdf
    • http://nationshield.ae/userfiles/files/free-coin-master-s_GM406889139.pdf
    • http://nationshield.ae/userfiles/files/free-robux-now_GM431946152.pdf
    • http://nationshield.ae/userfiles/files/coin-master-daily-free-spins-and-coins_GM406889139.pdf
    • http://nationshield.ae/userfiles/files/coin-master-hack-no-verify_GM406889139.pdf
    • http://nationshield.ae/userfiles/files/roblox-free-robux-generator_GM431946152.pdf
    • http://nationshield.ae/userfiles/files/free-minecraft-java-edition_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a3d.bin
c84f1296ed30d81da9f2e6a3735615718e368b54b97402028ee930b3626698bb
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A3D 29444 bytes
font_01_sfnt_off00008db0.bin
b3ad435d94df059fa4f5f4039152be4ff635e0c8c599297d8dd6c4123da1a60e
pdf-font-stream PDF embedded font (sfnt) at offset 0x8DB0 18672 bytes