Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e430f8908e90b22…

MALICIOUS

PDF

42.2 KB Created: 2021-05-12 02:54:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 45c8de97ce2fa132dfeda93b625ebfac SHA-1: 264c055eaf23b272392277809476a1f53c9b5733 SHA-256: 4e430f8908e90b225536288261d9e6478401e304f162fadc13e8f60a09b66a31
102 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are SEO-optimized and point to pages offering game hacks and cheats. The ML classifier strongly indicated maliciousness, and the presence of a call-to-action phrase further supports a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/coin-master-hack-spins-and-coins-unlimited-free-game-hack
    • https://www.summerland.com.tw/upload/files/what-games-on-roblox-give-you-free-robux_GM431946152.pdf
    • https://www.summerland.com.tw/upload/files/free-minecraft-account_GM479516143.pdf
    • https://www.summerland.com.tw/upload/files/free-links-for-coin-master_GM406889139.pdf
    • https://www.summerland.com.tw/upload/files/free-minecraft-bedrock-server-hosting-24-7_GM479516143.pdf
    • https://www.summerland.com.tw/upload/files/how-to-change-username-on-roblox-for-free_GM431946152.pdf
    • https://www.summerland.com.tw/upload/files/coin-master-free-spins-8-14-2021_GM406889139.pdf
    • https://www.summerland.com.tw/upload/files/martian-lettuce-coin-master-free_GM406889139.pdf
    • https://www.summerland.com.tw/upload/files/how-to-get-minecraft-windows-10-for-free-with-java_GM479516143.pdf
    • https://www.summerland.com.tw/upload/files/roblox-login-hack_GM431946152.pdf
    • https://www.summerland.com.tw/upload/files/coin-master-hack-no-human-verification-2021_GM406889139.pdf
    • https://www.summerland.com.tw/upload/files/daily-free-spins-coin-master_GM406889139.pdf
    • https://www.summerland.com.tw/upload/files/coin-master-hacks-for-spins_GM406889139.pdf
    • https://www.summerland.com.tw/upload/files/minecraft-hacks-18-9_GM479516143.pdf
    • https://www.summerland.com.tw/upload/files/roblox-bloxburg-free-money_GM431946152.pdf
    • https://www.summerland.com.tw/upload/files/free-spins-coin-master-blogspot_GM406889139.pdf
    • https://www.summerland.com.tw/upload/files/ios-coin-master-hack_GM406889139.pdf
    • https://www.summerland.com.tw/upload/files/free-robux-today_GM431946152.pdf
    • https://www.summerland.com.tw/upload/files/best-free-spin-app-for-coin-master_GM406889139.pdf
    • https://www.summerland.com.tw/upload/files/roblox-free-robux-no-human-verification_GM431946152.pdf
    • https://www.summerland.com.tw/upload/files/free-roblox-app_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000495b.bin
eca63e9e48749072a9daad574000ab240076de839f2dc9a84f24a60b8df0303b
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x495B 25128 bytes
font_01_sfnt_off00008162.bin
9894c068b10d635aa02e8d25afb59d141e90fd875449b50e52c6a3fbfc43112a
pdf-font-stream PDF embedded font (sfnt) at offset 0x8162 18752 bytes