Malicious PDF — malware analysis report

Static analysis result for SHA-256 599d0efee7f099ab…

MALICIOUS

PDF

35.5 KB Created: 2021-07-01 14:25:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 00bf956c89d5b16777623af0ae3fa74d SHA-1: 12ab50ffafa3c4356d638003f59e697a6b2b7646 SHA-256: 599d0efee7f099ab88896e0689644cc137bd89e04c371e5be3ff21d21a47a0c3
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external resources, including one directly hosted on netcdn.co, which are likely intended to lead users to download malicious files or exploit kits. The document body and embedded URLs suggest a lure related to free game items and accounts, a common tactic for distributing malware. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, increasing the likelihood of malicious intent.

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/free-roblox-accounts-2021-october-game-hack PDF link annotation
    • https://elearning.mtsnkotajayapura.sch.id/__statics/gudangsoal/files/roblox-jailbreak-hack-client-download-trackid-sp006-trackid-sp006_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnkotajayapura.sch.id/__statics/gudangsoal/files/free-robux-no-anything_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnkotajayapura.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnkotajayapura.sch.id/__statics/gudangsoal/files/roblox-hack-free-clothes_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnkotajayapura.sch.id/__statics/gudangsoal/files/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnkotajayapura.sch.id/__statics/gudangsoal/files/hack-download-mega-innovation-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnkotajayapura.sch.id/__statics/gudangsoal/files/roblox-electric-state-darkrp-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnkotajayapura.sch.id/__statics/gudangsoal/files/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnkotajayapura.sch.id/__statics/gudangsoal/files/is-minecraft-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsnkotajayapura.sch.id/__statics/gudangsoal/files/how-to-get-50k-robux-for-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnkotajayapura.sch.id/__statics/gudangsoal/files/minecraft-bedrock-server-hosting-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsnkotajayapura.sch.id/__statics/gudangsoal/files/roblox-pet-simulator-how-to-get-free-pets_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnkotajayapura.sch.id/__statics/gudangsoal/files/free-robux-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnkotajayapura.sch.id/__statics/gudangsoal/files/roblox-doungnquest-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnkotajayapura.sch.id/__statics/gudangsoal/files/free-robux-counter-for-roblox-apk_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnkotajayapura.sch.id/__statics/gudangsoal/files/how-to-hack-someone-on-roblox-with-google-chrome_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnkotajayapura.sch.id/__statics/gudangsoal/files/free-memeber-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnkotajayapura.sch.id/__statics/gudangsoal/files/any-roblox-game-pass-free-script_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnkotajayapura.sch.id/__statics/gudangsoal/files/free-roblox-accounts-user-names-and-passwords-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnkotajayapura.sch.id/__statics/gudangsoal/files/xeno-hack-roblox_GM431946152.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_off000032eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32EB 22436 bytes
SHA-256: c8e4148f1a1da8c406d563338ab2c47ff35488c8d2e001f6d6b999a28a1314fe
font_01_sfnt_off0000650d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x650D 19296 bytes
SHA-256: 0c34f4f773541867398f86c30310e6ac647c9a82f77ce7107275bcdae60cc1c8

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