Malicious PDF — malware analysis report

Static analysis result for SHA-256 11378fddb649e48f…

MALICIOUS

PDF

44.5 KB Created: 2021-05-13 15:01:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 9ac42cb506a87171eb43ce7208f4aeb2 SHA-1: 8f0d7b661451931be671f9cd80b3adf65933ac8c SHA-256: 11378fddb649e48fbe197b22aef4262b3487f5370d8eb2a92f031edf072cae5e
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external links, forming a link farm, with the primary purpose of directing users to game hacking content. The ML classifier strongly indicated maliciousness, and the presence of a 'download button' lure suggests a deceptive workflow. The document's content and structure indicate it's designed to trick users into downloading further malicious payloads or visiting compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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-game-hacking-game-hack
    • http://meisterhaus-guterl.de/images/coin-master-free-coins-hack_GM406889139.pdf
    • http://meisterhaus-guterl.de/images/how-to-hack-roblox-accounts-for-robux_GM431946152.pdf
    • http://meisterhaus-guterl.de/images/how-to-get-free-robux-for-real_GM431946152.pdf
    • http://meisterhaus-guterl.de/images/how-to-duplicate-coin-master-spin-hack_GM406889139.pdf
    • http://meisterhaus-guterl.de/images/how-to-buy-robux-for-free_GM431946152.pdf
    • http://meisterhaus-guterl.de/images/free-coins-for-planet-master-game_GM406889139.pdf
    • http://meisterhaus-guterl.de/images/getrobux-now_GM431946152.pdf
    • http://meisterhaus-guterl.de/images/free-robux-apk_GM431946152.pdf
    • http://meisterhaus-guterl.de/images/apps-for-free-spins-on-coin-master_GM406889139.pdf
    • http://meisterhaus-guterl.de/images/roblox-earn_GM431946152.pdf
    • http://meisterhaus-guterl.de/images/coin-master-daily-free-spins-link-today-twitter_GM406889139.pdf
    • http://meisterhaus-guterl.de/images/coin-master-free-spins-links-2021_GM406889139.pdf
    • http://meisterhaus-guterl.de/images/coin-master-free-spins-ios-app_GM406889139.pdf
    • http://meisterhaus-guterl.de/images/coin-master-free-spins-youthnow_GM406889139.pdf
    • http://meisterhaus-guterl.de/images/get-free-spins-coin-master-link_GM406889139.pdf
    • http://meisterhaus-guterl.de/images/how-to-get-free-robux-fast_GM431946152.pdf
    • http://meisterhaus-guterl.de/images/today-free-spin-coin-master_GM406889139.pdf
    • http://meisterhaus-guterl.de/images/free-robux-generator-com-roblox-hack_GM431946152.pdf
    • http://meisterhaus-guterl.de/images/pig-master-free-spins-and-coins_GM406889139.pdf
    • http://meisterhaus-guterl.de/images/can-you-get-minecraft-for-free_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004767.bin
9d6671b156794ee8a6da0c58b484ab139f2b8d2decdf7ae270ca91172ec5df56
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4767 24632 bytes
font_01_sfnt_off00008011.bin
d7024d2a14ca3b54454543b7f441278560a6f7474af2c306a42de4122714221f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8011 3216 bytes
font_02_sfnt_off00008b54.bin
62da0fdfc0c6032c2f0014be80ef488e4c1ececfe37f754bdf2231c0e671d3af
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B54 18264 bytes