Malicious PDF — malware analysis report

Static analysis result for SHA-256 a153df672b660f7c…

MALICIOUS

PDF

34.9 KB Created: 2021-07-04 20:56:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 6c6ebddca54fdc270bfdcd710ba8efba SHA-1: 6a039bfb83e37b3cd84ff4e8e2e667648b32dd17 SHA-256: a153df672b660f7c2503d7851c14d413047b3005134915a179e1a51c29ee3d1b
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many of which are SEO-optimized and point to sites offering 'hacks' or 'free spins' for games like Coin Master and Roblox. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a malicious intent to drive traffic to potentially malicious or phishing sites. The ML classifier also strongly flagged this PDF as malicious.

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/coin-master-twitter-free-spins-game-hack
    • http://stitqi.ac.id/website/repository/2021-coin-master-hack_GM406889139.pdf
    • http://stitqi.ac.id/website//repository/how-to-get-free-spins-in-coin-master_GM406889139.pdf
    • http://stitqi.ac.id/website//repository/coin-master-free-coins-and-spins-link-today_GM406889139.pdf
    • http://stitqi.ac.id/website//repository/minecraft-bedrock-download_GM479516143.pdf
    • http://stitqi.ac.id/website/repository/cmaster-club-coin-master-hack_GM406889139.pdf
    • http://stitqi.ac.id/website/repository/coin-master-hack-without-human-verification-india_GM406889139.pdf
    • http://stitqi.ac.id/website/repository/coin-master-hack-lost-world-2021_GM406889139.pdf
    • http://stitqi.ac.id/website/repository/how-to-hack-roblox-2021-march_GM431946152.pdf
    • http://stitqi.ac.id/website/repository/coin-master-free-coins-links-2021_GM406889139.pdf
    • http://stitqi.ac.id/website/repository/coin-master-2021-free-spins-link_GM406889139.pdf
    • http://stitqi.ac.id/website//repository/minecraft-hacker-skin_GM479516143.pdf
    • http://stitqi.ac.id/website/repository/get-roblox-items-free-crome-addon_GM431946152.pdf
    • http://stitqi.ac.id/website/repository/coinmaster-fan-page_GM406889139.pdf
    • http://stitqi.ac.id/website/repository/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdf
    • http://stitqi.ac.id/website/repository/free-robux-without-verification_GM431946152.pdf
    • http://stitqi.ac.id/website//repository/coin-master-hack-without-verification-code_GM406889139.pdf
    • http://stitqi.ac.id/website/repository/hacks-for-minecraft-windows-10_GM479516143.pdf
    • http://stitqi.ac.id/website/repository/freespinandcoin-blogspot_GM406889139.pdf
    • http://stitqi.ac.id/website/repository/download-minecraft-java-edition-free_GM479516143.pdf
    • http://stitqi.ac.id/website//repository/wurst-hacked-client-112-2_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003286.bin
5cdc69f7e154c2f2e999e966316c5c3b4001e525d87a6e42026ed56a56d2fb67
pdf-font-stream PDF embedded font (sfnt) at offset 0x3286 22732 bytes
font_01_sfnt_off00006568.bin
e01d93bf6b3b1ca3791082ec0b45fc012a06aff95b12f5f509e0a799f9ea8db5
pdf-font-stream PDF embedded font (sfnt) at offset 0x6568 18336 bytes