Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bd6a1a6f16f0540…

MALICIOUS

PDF

45.0 KB Created: 2021-05-17 05:24:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 31510e649de170d45411dd6519e4b10c SHA-1: 7be9f88a2b60f8199314e45b961835008a1ea061 SHA-256: 2bd6a1a6f16f0540b0ebd8c471ae14f71fc48ee44ae3f5794e0398199777fe1a
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links and a "download button" lure, indicating an attempt to direct users to external resources. The presence of a "PDF_SEO_LINK_FARM" heuristic suggests the document is part of a link farm designed to generate traffic or host malicious content. While no scripts were explicitly extracted, the structure and embedded URLs point towards a malicious intent, likely related to SEO spam or malware distribution.

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/479516143/chisel-and-bits-mod-pe-game-hack
    • http://www.pro-futuro.eu/images/free-coin-master-spins-link_GM406889139.pdf
    • http://www.pro-futuro.eu/images/is-minecraft-free-on-ps4_GM479516143.pdf
    • http://www.pro-futuro.eu/images/roblox-hack-ios_GM431946152.pdf
    • http://www.pro-futuro.eu/images/free-spin-coin-master-game_GM406889139.pdf
    • http://www.pro-futuro.eu/images/coin-master-free-cards-link-2021_GM406889139.pdf
    • http://www.pro-futuro.eu/images/coin-master-2021-free-spins-link_GM406889139.pdf
    • http://www.pro-futuro.eu/images/easy-robux-generator_GM431946152.pdf
    • http://www.pro-futuro.eu/images/can-you-give-me-free-robux_GM431946152.pdf
    • http://www.pro-futuro.eu/images/coin-master-hack-without-human-verification-2021_GM406889139.pdf
    • http://www.pro-futuro.eu/images/how-to-get-free-robux-codes-2021_GM431946152.pdf
    • http://www.pro-futuro.eu/images/coin-master-free-spins-hack_GM406889139.pdf
    • http://www.pro-futuro.eu/images/coin-master-twitter-free-spins_GM406889139.pdf
    • http://www.pro-futuro.eu/images/how-to-get-roebucks-in-roblox_GM431946152.pdf
    • http://www.pro-futuro.eu/images/free-robux-generator-2021_GM431946152.pdf
    • http://www.pro-futuro.eu/images/coin-master-free-spins-hack-no-human-verification_GM406889139.pdf
    • http://www.pro-futuro.eu/images/how-can-i-get-free-robux_GM431946152.pdf
    • http://www.pro-futuro.eu/images/how-to-change-roblox-username-for-free_GM431946152.pdf
    • http://www.pro-futuro.eu/images/hack-coin-master-android_GM406889139.pdf
    • http://www.pro-futuro.eu/images/coin-master-hack-ios-2021_GM406889139.pdf
    • http://www.pro-futuro.eu/images/where-to-get-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b82.bin
0810551b68a80cc2211b61b69c4c3dcee7dc6438cb43b15c047e2cbe1803c9cf
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B82 24752 bytes
font_01_sfnt_off0000831d.bin
3811f2fb1880daf4953efcc9c7427d9b438bced237490b00be4a6ec3ecea79e0
pdf-font-stream PDF embedded font (sfnt) at offset 0x831D 3092 bytes
font_02_sfnt_off00008dc7.bin
21600419038eacf8d17a25e0de8b2d3f701338884b0b037dc932f5efdb40593c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8DC7 18268 bytes