Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee47440389fe8b91…

MALICIOUS

PDF

34.7 KB Created: 2021-06-18 16:45:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 00d788636c5fa93b34eba86f10c9e85e SHA-1: efa56b26c5c3b129ce60d4692af62aff639c6353 SHA-256: ee47440389fe8b919a48d77fa13856d04bec2755c83cfc19b17efa24b8b66696
142 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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.
  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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-wearable-hair-roblox-game-hack PDF link annotation
    • https://lib.bunghatta.ac.id/app/repository/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/lvl7-roblox-hack_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-valkyrie-roblox_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-get-free-tiktok-likes_GM835599320.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/hack-dinero-en-roblox_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/minecraft-world-free-download_GM479516143.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-hack-roblox-to-get-robux-2021_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/minecraft-pocket-edition-download-free-pe-calculator_GM479516143.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/roblox-skina-free-copy-paste_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-get-free-robux-on-roblox-no-hacks-joshy_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-downgrade-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/roblox-source_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/minecraft-java-account-free_GM479516143.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_off000031b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31B3 22168 bytes
SHA-256: a718d6efddc086af910fdf5bac29add99ebe03eec96e89e305680bb351a0eb48
font_01_sfnt_off00006307.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6307 18968 bytes
SHA-256: a8f748a1fb993ac778e0d0c520b12ff46608b1cca4a51121c32ac74a571ee4e8

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