Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0147a9f092c802b…

MALICIOUS

PDF

34.4 KB Created: 2021-06-18 23:09:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b9037100b60fa125fa6026d3cceeaf8f SHA-1: 5069b3f174274e50f6dbf7bb4e83e7b0458b6769 SHA-256: b0147a9f092c802bce535466fb8d2b98821a2d46573c3aeecac3f3c0144c556c
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs and a document body that promotes game hacks and cheats for popular games like Roblox and Coin Master. The heuristic firings indicate a link farm and external URI usage, suggesting the document's primary purpose is to redirect users to potentially malicious websites. The ML classifier strongly flagged this PDF as malicious.

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/how-to-make-a-shirt-in-roblox-for-free-game-hack PDF link annotation
    • https://pustaka.mic.sch.id//repository/robux-game_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/free-robux-so-sick_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/united-gaming-net-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/2021-no-human-verification-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/free-vip-server-roblox-booga-booga_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/hack-scripting-in-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/codes-for-roblox-weight-lifting-simulator-3-hack-code_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/how-to-generate-free-coin-master-spin_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/earn-robux-today-earn-robux-today_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/how-to-earn-free-stars-on-coin-master_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/how-to-hack-coin-master-spin-in-hindi_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/do-you-get-windows-10-minecraft-for-free-with-java_GM479516143.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/coin-master-free-spins-hack-ios_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_off00002fe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FE6 21892 bytes
SHA-256: c50121d2a527ddaba8c94f8cca6550f959370790f542435e5109330aee8d34de
font_01_sfnt_off0000602f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x602F 19572 bytes
SHA-256: 06dcf8993f7831b27ccf6fb522ff5def894499306a4a0f5718ef4678ed12b189

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