Malicious PDF — malware analysis report

Static analysis result for SHA-256 62130ffd6c00d4d4…

MALICIOUS

PDF

44.5 KB Created: 2021-05-17 06:54:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5a88dde92acc6659d54930ae1d5aaad5 SHA-1: d058c70e76691371933de2e22175dfd0d02872bb SHA-256: 62130ffd6c00d4d402e7fd3547424282e3f9d998876deaa598f7b72468a6b56d
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, identified as a link farm, pointing to websites offering game-related cheats and currency. The ML classifier strongly indicates maliciousness, and the presence of external URIs suggests a redirection or download attempt. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution attempt, likely initiated via spearphishing.

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 https://netcdn.xyz/app/431946152/how-do-you-earn-robux-on-roblox-game-hack
    • https://www.sensationboats.com/images/a-lot-of-robux_GM431946152.pdf
    • https://www.sensationboats.com/images/minecraft-iphone-free_GM479516143.pdf
    • https://www.sensationboats.com/images/coin-master-links-free-spins_GM406889139.pdf
    • https://www.sensationboats.com/images/free-spin-links-coin-master-2021_GM406889139.pdf
    • https://www.sensationboats.com/images/coin-master-free-cards-hack_GM406889139.pdf
    • https://www.sensationboats.com/images/free-robux-without-human-verification-real_GM431946152.pdf
    • https://www.sensationboats.com/images/free-apk-mod-coin-master_GM406889139.pdf
    • https://www.sensationboats.com/images/minecraft-java-edition-free-download-for-android_GM479516143.pdf
    • https://www.sensationboats.com/images/how-to-hack-coin-master-pc_GM406889139.pdf
    • https://www.sensationboats.com/images/free-robux-sites-that-work_GM431946152.pdf
    • https://www.sensationboats.com/images/free-spin-in-coin-master_GM406889139.pdf
    • https://www.sensationboats.com/images/spin-rewards-coin-master_GM406889139.pdf
    • https://www.sensationboats.com/images/pig-master-free-coins-and-spins_GM406889139.pdf
    • https://www.sensationboats.com/images/how-do-u-get-free-robux_GM431946152.pdf
    • https://www.sensationboats.com/images/coin-master-hack-pc-2021_GM406889139.pdf
    • https://www.sensationboats.com/images/how-to-get-free-robux-on-ipad_GM431946152.pdf
    • https://www.sensationboats.com/images/coin-master-cheats-2021_GM406889139.pdf
    • https://www.sensationboats.com/images/free-spins-coin-master-hack_GM406889139.pdf
    • https://www.sensationboats.com/images/omplete-surveys-for-coin-master-free-spins_GM406889139.pdf
    • https://www.sensationboats.com/images/https-rbx-place-rewards_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004bd0.bin
1b1cf328e10800bdcca862f35a7330cd7dedd6e0d806885fd57fed1408da1d64
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BD0 26516 bytes
font_01_sfnt_off00008a46.bin
101d287b90a3798bf945b9e309dfc26ee4a82cf5cf33fc5f39034681ca663b5b
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A46 18644 bytes