Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ea81cc183cb7dc0…

MALICIOUS

PDF

33.4 KB Created: 2021-06-27 12:32:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c62c78fca228b90e8af3a9ca62ec72eb SHA-1: 30c804498f052afe41ec7b6122ac066976dca8a4 SHA-256: 4ea81cc183cb7dc05d949f7872f4d21c2e97b72036bb1e25303f13d63130d9ec
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF document contains a large number of external links, many of which are presented as 'SEO PDF links' and are related to game hacks and free in-game items. The document body explicitly mentions 'how-to-look-cool-on-roblox-for-free' and includes a direct URL to a download page. This indicates a lure to trick users into visiting malicious sites or downloading further malware, consistent with a phishing or social engineering attack.

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-look-cool-on-roblox-for-free-game-hack
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/pgsharp-pokemon-go-free-key_GM1094591345.pdf
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/roblox-free-play-at-school_GM431946152.pdf
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/fb-coin-master-hack_GM406889139.pdf
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/coin-master-hack-2021-ios-download_GM406889139.pdf
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/tiktok-free-views_GM835599320.pdf
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/master-8-ball-pool-free-coins_GM406889139.pdf
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins-link-2021_GM406889139.pdf
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/free-robux-without-downloading-anything_GM431946152.pdf
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/coin-master-apk-mod-hack-download_GM406889139.pdf
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/minecraft-com-free_GM479516143.pdf
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/robloxheroxyz-free-robux_GM431946152.pdf
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/master-coin-free-spin-daily_GM406889139.pdf
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/wizard-roblox-hack_GM431946152.pdf
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/robux-generator-without-human-verification-2021_GM431946152.pdf
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/how-to-change-roblox-username-for-free_GM431946152.pdf
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/offers-to-get-free-spins-in-coin-master_GM406889139.pdf
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/roblox-arsenal-hack_GM431946152.pdf
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/coin-master-hack-download-2021_GM406889139.pdf
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/where-can-i-get-free-coins-for-coin-master_GM406889139.pdf
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f02.bin
5606c5a62147aa471e503b91b12f1f83ddbe5d09f6a0af1425fbc6a138e20f33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F02 21360 bytes
font_01_sfnt_off00005d7f.bin
6e0c72ce5859b06520f49d40566a668f2d219a2028c44bd4c3a435c2d8ef5019		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D7F 18984 bytes

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