Malicious PDF — malware analysis report

Static analysis result for SHA-256 eab644455bd6d42e…

MALICIOUS

PDF

45.9 KB Created: 2021-06-01 00:22:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 48b4d658e17f7a2718ee0c9a830c7c7b SHA-1: b41e893789c65d16ccfec10292daec60550e3007 SHA-256: eab644455bd6d42e28716c287f16dc3c31357a32b499e45cbe69c025952ebbab
102 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which appear to be part of a link farm designed to drive traffic to SEO-optimized content. The ML classifier also flagged this PDF as malicious with high confidence. The primary goal appears to be redirecting users to potentially harmful websites, possibly for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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/which-stuff-are-free-on-roblox-category-game-hack
    • https://ozkara.be/wp-content/uploads/fsqm-files/free-ways-to-record-roblox-with-voice_GM431946152.pdf
    • https://ozkara.be/wp-content/uploads/fsqm-files/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdf
    • https://ozkara.be/wp-content/uploads/fsqm-files/cheat-engine-roblox-speedhacks_GM431946152.pdf
    • https://ozkara.be/wp-content/uploads/fsqm-files/minecraft-bedrock-server-hosting-free_GM479516143.pdf
    • https://ozkara.be/wp-content/uploads/fsqm-files/roblox-base-wars-free-admin_GM431946152.pdf
    • https://ozkara.be/wp-content/uploads/fsqm-files/cheats-roblox-survivor_GM431946152.pdf
    • https://ozkara.be/wp-content/uploads/fsqm-files/free-executor-for-roblox-pc-2021-no-virus_GM431946152.pdf
    • https://ozkara.be/wp-content/uploads/fsqm-files/hack-robux-free-2021_GM431946152.pdf
    • https://ozkara.be/wp-content/uploads/fsqm-files/flubhack-roblox_GM431946152.pdf
    • https://ozkara.be/wp-content/uploads/fsqm-files/games-that-give-you-free-robux_GM431946152.pdf
    • https://ozkara.be/wp-content/uploads/fsqm-files/coin-master-free-spins-link-2021_GM406889139.pdf
    • https://ozkara.be/wp-content/uploads/fsqm-files/roblox-player-free-download-for-pc_GM431946152.pdf
    • https://ozkara.be/wp-content/uploads/fsqm-files/how-to-get-free-robux-really-fast-and-easy_GM431946152.pdf
    • https://ozkara.be/wp-content/uploads/fsqm-files/claim-free-spins-coin-master_GM406889139.pdf
    • https://ozkara.be/wp-content/uploads/fsqm-files/how-to-hack-someones-roblox-account_GM431946152.pdf
    • https://ozkara.be/wp-content/uploads/fsqm-files/minecraft-education-edition-free_GM479516143.pdf
    • https://ozkara.be/wp-content/uploads/fsqm-files/how-to-earn-free-robux_GM431946152.pdf
    • https://ozkara.be/wp-content/uploads/fsqm-files/how-to-hack-roblox-build-a-boat-for-treasure_GM431946152.pdf
    • https://ozkara.be/wp-content/uploads/fsqm-files/free-spin-coin-master-2021-link_GM406889139.pdf
    • https://ozkara.be/wp-content/uploads/fsqm-files/free-robux-no-verification-needed_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005158.bin
25427e2a1829a8d04e11ab1ef981cb29338f41a82f2252815a3ee4918eb46d1c
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5158 26376 bytes
font_01_sfnt_off00008de1.bin
48fe0f1f3f5df807654d922aed36235a5bf3f3bfeb0bb34ae84160d923690d3f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8DE1 19372 bytes