Malicious PDF — malware analysis report

Static analysis result for SHA-256 b999ad5cb50a2883…

MALICIOUS

PDF

42.0 KB Created: 2021-05-10 19:02:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d0fb066a5e10593dab922aa0b0648f80 SHA-1: 08783481c968034910f0fd3e632bbdc3b8d95294 SHA-256: b999ad5cb50a28834fa11465272ebf22693da993185e7f2eb4895dbbe95e7342
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many of which are structured as SEO-optimized URLs pointing to game-related content and hacks. The presence of a download button lure and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content or downloads. The document body, though heavily corrupted, contains a URL that aligns with the heuristic findings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/minecraft-pe-free-apk-game-hack
    • https://repository.umgo.ac.id/repository/how-to-get-free-shields-on-coin-master_GM406889139.pdf
    • https://repository.umgo.ac.id/repository/coin-master-spins-hack-iphone_GM406889139.pdf
    • https://repository.umgo.ac.id/repository/gain-robux_GM431946152.pdf
    • https://repository.umgo.ac.id/repository/coin-master-free-cards-2021_GM406889139.pdf
    • https://repository.umgo.ac.id/repository/free-robux-codes-no-human-verification_GM431946152.pdf
    • https://repository.umgo.ac.id/repository/daily-coin-master-free-spin-link_GM406889139.pdf
    • https://repository.umgo.ac.id/repository/coin-master-deals_GM406889139.pdf
    • https://repository.umgo.ac.id/repository/free-spins-coinmaster_GM406889139.pdf
    • https://repository.umgo.ac.id/repository/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdf
    • https://repository.umgo.ac.id/repository/coin-master-admin-free-spins_GM406889139.pdf
    • https://repository.umgo.ac.id/repository/coin-master-free-card-link-today_GM406889139.pdf
    • https://repository.umgo.ac.id/repository/how-many-levels-in-coin-master_GM406889139.pdf
    • https://repository.umgo.ac.id/repository/free-minecraft-alt-generator_GM479516143.pdf
    • https://repository.umgo.ac.id/repository/how-to-get-minecraft-windows-10-for-free-with-java_GM479516143.pdf
    • https://repository.umgo.ac.id/repository/google-how-do-you-get-free-robux_GM431946152.pdf
    • https://repository.umgo.ac.id/repository/is-there-any-way-to-get-free-robux_GM431946152.pdf
    • https://repository.umgo.ac.id/repository/cute-free-hair-on-roblox_GM431946152.pdf
    • https://repository.umgo.ac.id/repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdf
    • https://repository.umgo.ac.id/repository/free-robux-no-human-verification-no-survey_GM431946152.pdf
    • https://repository.umgo.ac.id/repository/rare-free-links-to-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004ba7.bin
3933db438ff4e0c3bf220db6323c8b8806ce8a758c8e4eeeb80cffbbcfae4c99		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BA7 24368 bytes
font_01_sfnt_off0000828a.bin
35104518e66c8492531759eb706d86fdb36771bd3dd1e1625049e5bd6be6693d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x828A 18068 bytes

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