Malicious PDF — malware analysis report

Static analysis result for SHA-256 2401a25ce6e2d45d…

MALICIOUS

PDF

35.6 KB Created: 2021-07-10 01:29:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: bc1a5a28c2eecde38835028cd1b48d9e SHA-1: 6c76936bdf9d20014dd4620d6b3695e6c1de82b6 SHA-256: 2401a25ce6e2d45d2ce299496afff7d1beae2f07614c326a87a75e396c0e307f
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links to external websites, many of which are structured as SEO link farms for game-related cheats and currency. The document body and extracted URLs suggest a lure for obtaining in-game items, likely a phishing or malware distribution attempt. The ML classifier strongly supports the malicious nature of this PDF.

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.tw/app/406889139/free-coin-master-coins-2021-game-hack
    • http://mansatupati.my.id/__statics/gudangsoal/files/free-spins-for-coin-master-game_GM406889139.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/how-to-get-free-robux-in-roblox-2021-not-clickbait_GM431946152.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/roblox-microsoft-rewards_GM431946152.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/links-to-free-spins-on-coin-master_GM406889139.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/gfx-maker-free-roblox_GM431946152.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/coin-master-hack-without-verification-2021_GM406889139.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/free-robux-no-anti-bot-verification_GM431946152.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/coin-master-hacks-no-verification_GM406889139.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/free-coins-coin-master_GM406889139.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/free-coins-and-spins-for-coin-master_GM406889139.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/is-there-any-way-to-get-free-robux_GM431946152.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/roblox-com-free_GM431946152.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/free-robux-now_GM431946152.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/robux-free-robux_GM431946152.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-daily-links_GM406889139.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/daily-free-spins-coin-master_GM406889139.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/how-do-we-get-free-robux_GM431946152.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/free-minecraft-com_GM479516143.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/coin-master-spin-and-coins-free_GM406889139.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/coin-master-free-spins-8-14-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000346d.bin
99e23c73bc37f65380eef0417e2e66155cbd76362a53e85c8fd7405f1a4773e2		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x346D 22984 bytes
font_01_sfnt_off00006833.bin
e5d3a6dc934cd1d6a3271fcf72c550eb6933cb497ca30567b0f4f4decc45aa51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6833 18400 bytes

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