Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b79abdfd2941e62…

MALICIOUS

PDF

34.0 KB Created: 2021-06-28 08:20:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3a51fc6b5ed9c1514642e1e7e59166c9 SHA-1: 6e2df6a243d153a8e0827cbd72755343a972beb0 SHA-256: 0b79abdfd2941e628469c159b41e51db7f2af88d461c8473c1f1455a1637147e
142 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are structured as SEO-optimized PDF files related to game cheats and free items. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' indicates the document likely instructs the user to copy and paste content into a command-line interface, suggesting an attempt to trick the user into executing a malicious payload. The ML classifier strongly flags this PDF as malicious, supporting the overall assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 5

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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 http://netcdn.co/app/431946152/roblox-fly-cheat-engine-game-hack PDF link annotation
    • https://www.cinemapalace.ro/trailer/files/how-to-free-robux_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/free-roblox-gift-card-earning-points_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/roblox-hacks-for-tablet_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/how-much-pokemon-go-free-account_GM1094591345.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/roblox-com-redeem_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/coin-master-unlimited-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/hack-the-game-coin-master_GM406889139.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/noclip-hack-roblox-jailbreak-may2021_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/github-script-cheat-stc-lua-roblox_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/tiktok-free-likes-no-verification_GM835599320.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/free-links-to-coin-master_GM406889139.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/coin-master-free-spins-fb-champion_GM406889139.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/coin-master-apk-hack-35-8_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EE5 21932 bytes
SHA-256: 06e2bdd5e4cf81263f7fe77a17ab982d4ea4b6c89a5901a888899d49828c2da2
font_01_sfnt_off00005f57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F57 19220 bytes
SHA-256: 07a7aacc59fb3b6ca7f8e51c49e51e4afa1bcdff6c5e6777a52f9d4cd95b8054

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