Malicious PDF — malware analysis report

Static analysis result for SHA-256 257703bc246ce720…

MALICIOUS

PDF

46.9 KB Created: 2021-06-09 17:33:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 4b6290dd43ef01c7716197dfea4b5d6e SHA-1: e3ecde75ee42e1c8cfb09a96753ef50672218194 SHA-256: 257703bc246ce7202f5f5585a2f5a64db3d0a008002c226b880ffca3c7f304d8
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, identified as a link farm, that point to external websites. The document body and heuristics suggest these links are designed to trick users into believing they can access cheats or hacks for games like Roblox and Minecraft. The presence of these links and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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.tw/app/431946152/how-to-hack-an-account-in-roblox-game-hack PDF link annotation
    • https://lib.bunghatta.ac.id/app/repository/coin-master-spin-ml-link_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/coin-master-hack-app-2021-download_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/minecraft-redeem-code-free_GM479516143.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/mcpe-master-unlimited-coins-hack-apk_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/roblox-cheat-codes_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/coin-master-rewards-app_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/www-coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/pokemon-go-free-gift-codes_GM1094591345.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/gaming-dunia-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/coin-master-village-3_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-robux-downlaod-trackid-sp006_GM431946152.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
font_00_sfnt_off00004d18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D18 25784 bytes
SHA-256: 964c0b22b129f6fedca00c6e11bf399505c4d5de5013ac6b0874b3aa2b610dbd
font_01_sfnt_off000086d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86D7 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off0000937e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x937E 18588 bytes
SHA-256: d673a46936a09d2b715b05effbdf16396a1fdb7d40ab82f49bf2e8cfa37ab50f

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