Malicious PDF — malware analysis report

Static analysis result for SHA-256 b63d51e34dbbb47f…

MALICIOUS

PDF

35.6 KB Created: 2021-06-25 04:35:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: e0d2b7865d34e5aae6be053a29df40e3 SHA-1: ebda690f359614f3d938316f9ea09651f5b75a2b SHA-256: b63d51e34dbbb47fd2ced17762c3fbadda2c3f143d8bb4d2aff853e2b90870d4
102 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which are disguised as helpful resources for popular games. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, and the ML classifier strongly flagged this PDF as malicious. The document body and extracted URLs suggest a lure for users seeking free in-game currency or items, likely leading to phishing or malware download sites.

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/406889139/how-to-get-spins-for-free-on-coin-master-game-hack
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/roblox-hack-com_GM431946152.pdf
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/how-to-get-robux-for-free-2021_GM431946152.pdf
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/coin-master-free-raid-link_GM406889139.pdf
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdf
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/free-robux-sites-2021_GM431946152.pdf
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/roblox-free-clothes-promo-codes_GM431946152.pdf
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/free-robux-no-gift-card_GM431946152.pdf
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/how-to-get-free-shirts-on-roblox_GM431946152.pdf
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/free-robux-please_GM431946152.pdf
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/how-to-change-your-username-on-roblox-for-free_GM431946152.pdf
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/how-to-change-roblox-username-for-free_GM431946152.pdf
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/coin-master-free-spin-and-coin-links_GM406889139.pdf
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/legit-free-spins-coin-master_GM406889139.pdf
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/is-minecraft-bedrock-free_GM479516143.pdf
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/free-robux-no-offers_GM431946152.pdf
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/free-spin-coin-master-game_GM406889139.pdf
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/hacking-scripts-to-hack-roblox-gamemodes_GM431946152.pdf
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/roblox-zone-free-robux_GM431946152.pdf
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/coin-master-hack-lost-world-2021_GM406889139.pdf
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/daily-coin-master-link_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003416.bin
bffcd085b419742d6670cfeae52795f573ffe64d24da4558e18907e0ccbd6248		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3416 23372 bytes
font_01_sfnt_off0000689c.bin
a841261eefc9091920f66d88f6abc9f0517b4e443c58d75395461243cacd8539		 pdf-font-stream PDF embedded font (sfnt) at offset 0x689C 18336 bytes

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