Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cda5489e82dc9a2…

MALICIOUS

PDF

34.9 KB Created: 2021-06-26 07:02:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 2bc265cca2fddbbc7c7759a991255a12 SHA-1: b8f55adcf485fa8f5101b56d94bbdfddec7dcad3 SHA-256: 4cda5489e82dc9a2bcd9596c6a71c1b2f924f47431334ea1390e1fda11d1f74e
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a malicious lure, employing a 'link farm' technique to direct users to external sites promising free in-game currency. The document body and extracted URLs strongly suggest a phishing or scam attempt, likely leading to malware download or credential harvesting. The presence of numerous SEO-optimized PDF links points to a coordinated effort to distribute malicious content.

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.co/app/431946152/how-to-earn-free-robux
    • https://man1tuban.sch.id/__statics/gudangsoal/files/how-to-hack-into-someones-roblox-account_GM431946152.pdf
    • https://man1tuban.sch.id/__statics/gudangsoal/files/how-to-earn-robux-fast_GM431946152.pdf
    • https://man1tuban.sch.id/__statics/gudangsoal/files/robux-com-free-robux_GM431946152.pdf
    • https://man1tuban.sch.id/__statics/gudangsoal/files/coin-master-attack-hack-apk_GM406889139.pdf
    • https://man1tuban.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-grom-coin-master_GM406889139.pdf
    • https://man1tuban.sch.id/__statics/gudangsoal/files/coin-master-free-spin-daily-link_GM406889139.pdf
    • https://man1tuban.sch.id/__statics/gudangsoal/files/coin-master-hack-without-human-verification_GM406889139.pdf
    • https://man1tuban.sch.id/__statics/gudangsoal/files/coin-master-hack-version-ios_GM406889139.pdf
    • https://man1tuban.sch.id/__statics/gudangsoal/files/free-roblox-passwords_GM431946152.pdf
    • https://man1tuban.sch.id/__statics/gudangsoal/files/coin-master-free-spins-only_GM406889139.pdf
    • https://man1tuban.sch.id/__statics/gudangsoal/files/free-robux-rewards_GM431946152.pdf
    • https://man1tuban.sch.id/__statics/gudangsoal/files/free-coin-and-spin-for-coin-master_GM406889139.pdf
    • https://man1tuban.sch.id/__statics/gudangsoal/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdf
    • https://man1tuban.sch.id/__statics/gudangsoal/files/is-minecraft-dungeons-free_GM479516143.pdf
    • https://man1tuban.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins_GM406889139.pdf
    • https://man1tuban.sch.id/__statics/gudangsoal/files/blogger-coin-master-free-spins_GM406889139.pdf
    • https://man1tuban.sch.id/__statics/gudangsoal/files/roblox-microsoft-rewards_GM431946152.pdf
    • https://man1tuban.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-today-haktuts_GM406889139.pdf
    • https://man1tuban.sch.id/__statics/gudangsoal/files/coin-master-hack-app-2021_GM406889139.pdf
    • https://man1tuban.sch.id/__statics/gudangsoal/files/rbxoffer-com-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_off00003172.bin
dc8943bd4df9cf98cb7d4a27bfc2dbbaa0b1597d09dba9bee6d4f1a013fbe2ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3172 22488 bytes
font_01_sfnt_off0000637d.bin
e03093419fd205410d578bb0fa2d8b83ead95ffa425543db3d5edf66ee9a3f83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x637D 18944 bytes

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