Malicious PDF — malware analysis report

Static analysis result for SHA-256 bca036633a1b7a23…

MALICIOUS

PDF

46.5 KB Created: 2021-05-10 18:04:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: bcf1895c25e7d91660a6e10745f8f692 SHA-1: 3bca81b581ffc28ff2aafedda8273e4145c6d734 SHA-256: bca036633a1b7a232644e5aa41e208eb248e03423b5b39e70abecaa6fcfd577d
102 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, many of which are structured as SEO-friendly URLs pointing to pages promising free Robux or Coin Master spins. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such external links, suggesting a malicious intent to redirect users to potentially harmful websites. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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/robloxhero.xyz-free-robux-game-hack PDF link annotation
    • http://www.pspmrsmmbk.com/cendana//repository/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/get-free-spins-on-coin-master-links_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/robux-offers_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/coin-master-hack-apk-ios_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/dailyrobux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/coin-master-app-for-free-spins_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/hack-coin-master-using-pc_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/free-coins-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/is-roblox-free-on-xbox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/roblox-a_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/hack-coin-master-game-download_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/how-do-you-get-roebucks-for-free_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/free-coin-master-account_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004940.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4940 27564 bytes
SHA-256: ceb0ef9019b83a89a01066527bbd39c14c96136c97042a94d7c287fbef92f6ad
font_01_sfnt_off00008865.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8865 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off0000924f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x924F 18584 bytes
SHA-256: d96645d743d7bc7e16305d404e9ae036d13b2ec1544ce4a3e073a2af54c3cd1e

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