Malicious PDF — malware analysis report

Static analysis result for SHA-256 3504c82fa7a9ce34…

MALICIOUS

PDF

45.0 KB Created: 2021-05-14 17:04:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 6d9d0bbaa1b93da40b2f7d8818fbdda4 SHA-1: 90512be543870046d0cad570272e2e7fa67afdad SHA-256: 3504c82fa7a9ce34682d33092375c3dca9cb41733e6f6fa74c76353b3082d7d3
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs and a link farm heuristic, indicating an attempt to redirect users to malicious sites. The document body, though partially corrupted, suggests a lure related to free game installations or in-game currency. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to trick users into downloading unwanted or harmful content.

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/how-to-install-minecraft-for-free-on-ios-game-hack
    • http://boliviagasenergia.com/images/10-robux_GM431946152.pdf
    • http://boliviagasenergia.com/images/how-to-get-minecraft-pocket-edition-for-free_GM479516143.pdf
    • http://boliviagasenergia.com/images/coin-master-hack-tool-ios_GM406889139.pdf
    • http://boliviagasenergia.com/images/free-coins-on-coin-master_GM406889139.pdf
    • http://boliviagasenergia.com/images/how-to-get-free-unlimited-robux_GM431946152.pdf
    • http://boliviagasenergia.com/images/coin-master-game-hacks_GM406889139.pdf
    • http://boliviagasenergia.com/images/free-spins-coin-master-hack-2021_GM406889139.pdf
    • http://boliviagasenergia.com/images/coin-master-free-coins-link-2021_GM406889139.pdf
    • http://boliviagasenergia.com/images/mcpe-client_GM479516143.pdf
    • http://boliviagasenergia.com/images/how-to-make-free-robux_GM431946152.pdf
    • http://boliviagasenergia.com/images/is-roblox-free-on-pc_GM431946152.pdf
    • http://boliviagasenergia.com/images/coin-master-free-spin-daily-bonus_GM406889139.pdf
    • http://boliviagasenergia.com/images/free-robux-on-iphone_GM431946152.pdf
    • http://boliviagasenergia.com/images/coin-master-free-spins-and-cards_GM406889139.pdf
    • http://boliviagasenergia.com/images/coin-master-pro-hack_GM406889139.pdf
    • http://boliviagasenergia.com/images/free-robux-no-email_GM431946152.pdf
    • http://boliviagasenergia.com/images/roblox-speed-hack_GM431946152.pdf
    • http://boliviagasenergia.com/images/coin-master-free-mighty-lion-card_GM406889139.pdf
    • http://boliviagasenergia.com/images/free-minecraft-account-generator_GM479516143.pdf
    • http://boliviagasenergia.com/images/coin-master-free-spins-deutsch-download-2021-link_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004aed.bin
43fe3282c2643472b9ab545ef058b31cfdfcfee88e6ddb67a90ebb1ab42b2633		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AED 25152 bytes
font_01_sfnt_off000083f4.bin
dd24a0ab94df4552e459bd06fd01b0fd3f021c1d51d1d64407070e735974a028		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83F4 3056 bytes
font_02_sfnt_off00008e67.bin
105e1adf3a8ec01b7ad4e3637eb20d748d74417b36eb8a9b6e8dc278cccf0612		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E67 17948 bytes

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