Malicious PDF — malware analysis report

Static analysis result for SHA-256 66456141e43731c5…

MALICIOUS

PDF

45.3 KB Created: 2021-05-20 06:46:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 3e0f7de7cd13830a2262e3e79b47c669 SHA-1: 7e02bc9132e4cffb314e34d275446c75cdb8ad19 SHA-256: 66456141e43731c5e8c900f78454f8695da7afad70b816843b4849368683f919
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many of which are disguised as links to free in-game items or currency. The document body and heuristics indicate a 'link farm' or SEO spam tactic, with the primary goal of directing users to potentially malicious websites. The presence of embedded URLs and the 'ML_NYX_PDF_MALICIOUS' heuristic strongly suggest malicious intent, likely to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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 https://netcdn.xyz/app/406889139/free-spin-and-coin-links-game-hack
    • http://parsbaft.com/images/pokemon-go-free-remote-raid-pass-january-2021_GM1094591345.pdf
    • http://parsbaft.com/images/easy-free-spins-coin-master_GM406889139.pdf
    • http://parsbaft.com/images/free-robux-apps-that-work_GM431946152.pdf
    • http://parsbaft.com/images/free-draw-2-roblox_GM431946152.pdf
    • http://parsbaft.com/images/coin-master-free-spin-daily-link_GM406889139.pdf
    • http://parsbaft.com/images/minecraft-free-education_GM479516143.pdf
    • http://parsbaft.com/images/free-spin-link-of-coin-master_GM406889139.pdf
    • http://parsbaft.com/images/is-minecraft-java-edition-free_GM479516143.pdf
    • http://parsbaft.com/images/coin-master-spin-free_GM406889139.pdf
    • http://parsbaft.com/images/how-do-you-earn-robux_GM431946152.pdf
    • http://parsbaft.com/images/free-robux-no-offers_GM431946152.pdf
    • http://parsbaft.com/images/roblox-pics_GM431946152.pdf
    • http://parsbaft.com/images/how-to-get-free-pet-food-in-coin-master_GM406889139.pdf
    • http://parsbaft.com/images/free-robux-link_GM431946152.pdf
    • http://parsbaft.com/images/free-coin-master-spins-daily_GM406889139.pdf
    • http://parsbaft.com/images/coin-master-mod-apk_GM406889139.pdf
    • http://parsbaft.com/images/how-to-hack-coin-master-with-game-guardian_GM406889139.pdf
    • http://parsbaft.com/images/coin-master-free-spins-and-coins-daily_GM406889139.pdf
    • http://parsbaft.com/images/free-ways-to-get-robux_GM431946152.pdf
    • http://parsbaft.com/images/free-spin-coin-master-iphone_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049ef.bin
31809fae8264c778ae2f7a13c42a2836e5b7be7c799ae6993f8d9144447f8cd2
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49EF 25468 bytes
font_01_sfnt_off00008404.bin
1dd933c112880b232546f3aab6a17784a8f412d39fd551cc6eb31c5a04c3ce57
pdf-font-stream PDF embedded font (sfnt) at offset 0x8404 3380 bytes
font_02_sfnt_off00008fed.bin
9e473fa370b66a6494b15977b9d2a3ea7c01ddc9c3166ab955b90e57f7a3e83c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8FED 17896 bytes