Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d805c54e998afbb…

MALICIOUS

PDF

35.6 KB Created: 2021-06-26 18:22:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: fb309ab2f9b4ab34e08febd2946948bc SHA-1: c448ca0e034ba5fdf09abf4ce417c7c2a3c66e77 SHA-256: 8d805c54e998afbb65652c84f47ce03953253e4025e94400935d097c0e3e6fe3
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF document employs a brand-impersonation lure, specifically mentioning 'Apple' and offering a 'Speed Hack' for Roblox, to trick users into clicking a link. The primary link, http://netcdn.co/app/431946152/speed-hack-roblox-booga-booga-game-hack, likely leads to a malicious download. The document also contains a large number of other embedded links, suggesting a link farm or SEO poisoning tactic to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: http://netcdn.co/app/431946152/speed-hack-roblox-booga-booga-game-hack.
  • 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/speed-hack-roblox-booga-booga-game-hack PDF link annotation
    • https://elearning.mtsnurulyaqingtlo.sch.id/__statics/gudangsoal/files/100-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnurulyaqingtlo.sch.id/__statics/gudangsoal/files/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnurulyaqingtlo.sch.id/__statics/gudangsoal/files/coin-master-cheats-free-spins_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnurulyaqingtlo.sch.id/__statics/gudangsoal/files/minecraft-free-education_GM479516143.pdfIn PDF document text
    • https://elearning.mtsnurulyaqingtlo.sch.id/__statics/gudangsoal/files/how-to-get-free-tiktok-coins_GM835599320.pdfIn PDF document text
    • https://elearning.mtsnurulyaqingtlo.sch.id/__statics/gudangsoal/files/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnurulyaqingtlo.sch.id/__statics/gudangsoal/files/free-spin-sites-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnurulyaqingtlo.sch.id/__statics/gudangsoal/files/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnurulyaqingtlo.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnurulyaqingtlo.sch.id/__statics/gudangsoal/files/is-minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsnurulyaqingtlo.sch.id/__statics/gudangsoal/files/free-spins-and-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnurulyaqingtlo.sch.id/__statics/gudangsoal/files/minecraft-toys-for-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsnurulyaqingtlo.sch.id/__statics/gudangsoal/files/free-spins-coin-master-apple_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnurulyaqingtlo.sch.id/__statics/gudangsoal/files/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnurulyaqingtlo.sch.id/__statics/gudangsoal/files/coin-master-free-2021-spin-link-today_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnurulyaqingtlo.sch.id/__statics/gudangsoal/files/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnurulyaqingtlo.sch.id/__statics/gudangsoal/files/free-modded-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://elearning.mtsnurulyaqingtlo.sch.id/__statics/gudangsoal/files/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnurulyaqingtlo.sch.id/__statics/gudangsoal/files/wurst-18-9_GM479516143.pdfIn PDF document text
    • https://elearning.mtsnurulyaqingtlo.sch.id/__statics/gudangsoal/files/pokemon-go-free-kanto-tour_GM1094591345.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_off00003440.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3440 22408 bytes
SHA-256: 8b29f3cc9ba79b8fc960a58b93dda986eef92a57415f74b25c86a8d8ce7c7433
font_01_sfnt_off00006641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6641 19008 bytes
SHA-256: 8ba21fb7f939df8d7c39e9dcc45c02dbaebf47b06b5edcfd70613837b47b27fc

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