Malicious PDF — malware analysis report

Static analysis result for SHA-256 9084a599dc09d5cb…

MALICIOUS

PDF

35.7 KB Created: 2021-07-03 12:06:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: fab77d5efef0405bed4557e303ef0546 SHA-1: ddfa94037765398fa645b049228ba067e93f766d SHA-256: 9084a599dc09d5cb4804eda7a722e123833fb3961984a29c4897be7a88c577d5
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains numerous links to external websites, many of which are hosted on domains associated with link farms and SEO manipulation. The document body and heuristics indicate a lure for game hacks and generators, such as 'como-meterse-hacks-en-roblox-game-hack'. This suggests the PDF is designed to redirect users to potentially malicious sites that may host malware or engage in phishing.

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.tw/app/431946152/como-meterse-hacks-en-roblox-game-hack PDF link annotation
    • http://stmb-multismart.ac.id/perpustakaan/repository/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/coin-master-hack-lost-world-2021-com_GM406889139.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/thanos-shirt-roblox-free_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/coin-master-hack-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/ben-10-universal-showdown-cheats-codes-roblox_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/coin-master-free-spins-fb-champion_GM406889139.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/coin-master-free-spins-daily-fb-champion_GM406889139.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/minecraft-windows-10-edition-hacked-client_GM479516143.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/free-account-in-roblox-real_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/how-do-u-speed-hack-in-mm2-roblox_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/pubg-uc-through-easypaisa_GM1330123889.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/how-to-enter-a-cheats-code-in-roblox_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/free-robux-codes-2021-november_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/wie-kann-man-ihn-roblox-hacken-um-robaks_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/how-to-get-free-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/shadow-raid-loot-cheats-roblox-notoriety_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/hack-robux-in-2021-easy_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/roblox-cheat-codes-rocitizensnovember-2021_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_off00003328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3328 22764 bytes
SHA-256: aeec647a8e89743e9ccfed24481340a37d742445bb1cfcab3abb4ccc21ad8ab6
font_01_sfnt_off00006613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6613 19216 bytes
SHA-256: 64b57c411d5b517721cf46ad01f3d3ce256b35eeda13cd8a4a57c594edb0d076

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