Malicious PDF — malware analysis report

Static analysis result for SHA-256 89159d1a7ecdf63c…

MALICIOUS

PDF

33.2 KB Created: 2021-06-18 13:18:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a4f17c5c6cfb98d36a9aac9c9e08a089 SHA-1: 923c87a193b64cc9697166c69ab8dba4a71ad314 SHA-256: 89159d1a7ecdf63c9779f29c9ea998bf9baedec1c5c7115b04b3af863b840b2e
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded URLs and a primary external URI, all pointing to sites offering game cheats and currency generators. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a tactic to distribute malicious content or phish for credentials. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/robux-and-tix-no-hack-game-hack
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/coin-master-game-hacks_GM406889139.pdf
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/static-moonactive-net-free-spins_GM406889139.pdf
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/robux-hack_GM431946152.pdf
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/free-coins-coin-master-link_GM406889139.pdf
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/free-spin-link-of-coin-master_GM406889139.pdf
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/free-unlimited-coin-master-400-spin-link_GM406889139.pdf
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/coin-master-hack-spins-free_GM406889139.pdf
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/coin-master-free-spins-link-2021_GM406889139.pdf
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/how-to-get-obc-and-robux-for-free-2021_GM431946152.pdf
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/how-to-install-minecraft-for-free-on-ios_GM479516143.pdf
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/free-coins-coin-master-iphone_GM406889139.pdf
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/easy-robux-com_GM431946152.pdf
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/protosmasher-roblox-free-download_GM431946152.pdf
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/coin-master-hack-tool-apk-download_GM406889139.pdf
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/websites-to-get-free-robux_GM431946152.pdf
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/how-to-hack-golden-card-in-coin-master_GM406889139.pdf
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/free-robux-pastebin-2021_GM431946152.pdf
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/how-to-get-free-stuff-on-roblox-catalog-2021_GM431946152.pdf
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/coin-master-free-spin-today_GM406889139.pdf
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/robux-hack-no-verification_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002cad.bin
d76a1ecff5b6299e60e9772bd301ad19891e5f06a23715d07c50c73511bc2030		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CAD 21884 bytes
font_01_sfnt_off00005d1a.bin
b15c54bda032467fa1cd0f783eb5e90aa39ace41a03ae6fddfcbbc994202d17b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D1A 19016 bytes

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