Malicious PDF — malware analysis report

Static analysis result for SHA-256 28e854e7b24b6cdb…

MALICIOUS

PDF

35.9 KB Created: 2021-06-26 09:34:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: c5f1ff27f7c4ee4e9e2d2e4f3960a768 SHA-1: e4686e03d2c86bd3c8c36640e1c9709d77660db5 SHA-256: 28e854e7b24b6cdbcf14780b6d44bd7fa2e88db7bd7d619de2e9e63ab6cb7883
102 Risk Score

Malware Insights

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

The PDF document contains numerous links and text referencing free Robux, Coin Master spins, and game hacks, indicating a lure for users seeking such cheats. The PDF_SEO_LINK_FARM heuristic firing suggests a large number of these links are present, likely to drive traffic to malicious sites. The ML_NYX_PDF_MALICIOUS score further supports the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/hey-google-can-you-give-me-free-robux-game-hack PDF link annotation
    • http://pustaka.fti.unand.ac.id//repository/robux-xyz_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/how-to-hack-someones-roblox-account-with-inspect-element-android_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/wwe-backpack-roblox-free_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/free-spins-coin-master-2021-no-verification_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/farming-simulator-hack-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/free-spins-for-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/free-spin-gratis-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/roblox-infinite-jump-cheat-engine_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/haktuts-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/free-robux-generator-no-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/roblox-free-thumbnails_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/roblox-hack-ban_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/coin-master-spin-link-free_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/keybinds-v2-free-download-for-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/roblox-speed-hack-download-2021_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off00003339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3339 22808 bytes
SHA-256: 0d7abbf8588bb20ae54ce15fd71852f296183da22f542f6b79ec72fae7d2f1c2
font_01_sfnt_off000065f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65F3 19564 bytes
SHA-256: cae8c7c91969bddc0af9795dfd9270e4fe60ee9053c9d032a0bd8f6a8c1b7240

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