Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f93f5756129d1ac…

MALICIOUS

PDF

34.2 KB Created: 2021-06-19 20:28:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d36a0ba23403a6e4ecea9ee80d34720d SHA-1: 255fa3bf7c5a0e62b544f546b3b12a429bf50bc5 SHA-256: 2f93f5756129d1acbd2716e5bd35bc5fba6d9c6a3a5526e54eed237ad0d5d34d
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs and a document body that mimics search engine results for game cheats and free currency, indicating a lure for users to download potentially malicious content. The ML classifier and PDF link farm heuristics strongly suggest malicious intent, likely to deliver a second-stage payload via the linked resources.

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-get-robux-free-sin-pastebin-2021-game-hack
    • http://muslib.unmus.ac.id/repository/how-to-download-roblox-cheat-engine_GM431946152.pdf
    • http://muslib.unmus.ac.id/repository/online-coin-master-free-spin-app_GM406889139.pdf
    • http://muslib.unmus.ac.id/repository/is-tiktok-free-on-iphone_GM835599320.pdf
    • http://muslib.unmus.ac.id/repository/coin-master-hack-download-apk_GM406889139.pdf
    • http://muslib.unmus.ac.id/repository/coin-master-free-spins-link-download_GM406889139.pdf
    • http://muslib.unmus.ac.id/repository/notoriety-roblox-shadow-raid-secret-cheat_GM431946152.pdf
    • http://muslib.unmus.ac.id/repository/100-robux_GM431946152.pdf
    • http://muslib.unmus.ac.id/repository/free-old-roblox-accounts-pastebin_GM431946152.pdf
    • http://muslib.unmus.ac.id//repository/coin-master-free-spins-16-04-19_GM406889139.pdf
    • http://muslib.unmus.ac.id//repository/how-do-i-get-minecraft-for-free_GM479516143.pdf
    • http://muslib.unmus.ac.id/repository/free-jeans-roblox_GM431946152.pdf
    • http://muslib.unmus.ac.id//repository/how-to-get-free-pokemon-go-accounts_GM1094591345.pdf
    • http://muslib.unmus.ac.id/repository/coin-master-spin-link_GM406889139.pdf
    • http://muslib.unmus.ac.id/repository/coin-master-hack-download-android_GM406889139.pdf
    • http://muslib.unmus.ac.id/repository/free-robux-without-survey_GM431946152.pdf
    • http://muslib.unmus.ac.id/repository/scaciati-mega-cheat-roblox-2021_GM431946152.pdf
    • http://muslib.unmus.ac.id/repository/is-coin-master-free_GM406889139.pdf
    • http://muslib.unmus.ac.id/repository/free-cracked-minecraft-server-hosting_GM479516143.pdf
    • http://muslib.unmus.ac.id/repository/free-robux-copypasta_GM431946152.pdf
    • http://muslib.unmus.ac.id/repository/prison-life-roblox-hack-download-20212021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002dea.bin
d5e7bbefe45fba3dc89380d0857e31867ba13bb53d34fd3b68498dc10b120a22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2DEA 22040 bytes
font_01_sfnt_off00005ecf.bin
ed9b537c2dd98dda066327473ad8204994c0c9621fed4c2f4ae0ed23d3f32555		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ECF 19660 bytes

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