Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddae2222511c141f…

MALICIOUS

PDF

34.0 KB Created: 2021-07-06 10:09:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 70e8c56eed1772148ee1fe67d818352e SHA-1: 4035728da8c4d5d1a7641da77e52afa480be60c5 SHA-256: ddae2222511c141fb0e07b8946394849ecbb126f204033fefc603ad7d0113f61
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'free Robux' and game hacks, directing users to the URL http://netcdn.tw/app/431946152/free-robux-cards-game-hack. This URL is flagged as a high-risk redirector, and the ML classifier strongly indicates maliciousness. The document body and heuristics suggest a social engineering tactic to trick users into visiting a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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/free-robux-cards-game-hack PDF link annotation
    • http://www.stttekstil.ac.id/elib/repository/what-tiktok-free-views-without-verification_GM835599320.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-to-hack-coin-master-computer_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-minecraft-client_GM479516143.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-working-roblox-exploits_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/change-you-roblox-name-for-free_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/coin-master-hack-cydia_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/coin-master-free_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/minecraft-java-edition-code-free_GM479516143.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-freebies-free-robux_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/robux-hack-500m_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-glasses-free_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-generator-com_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/toolbox-for-minecraft-pe-ios_GM479516143.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/hacks-for-roblox-2021-for-mac_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-2-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-com-robux_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-to-get-free-robux-in-adopt-me_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-coin-and-spin-for-coin-master_GM406889139.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_off00002ec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EC7 22296 bytes
SHA-256: 1a4eb31848ba30f1d58b1b1c7d1007045e734818f5d72c30dad1a7ba0f4572ad
font_01_sfnt_off0000605c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x605C 18888 bytes
SHA-256: 6c6de0ceaed5fc014d3dcce92ca1cb896bf7995edf6e50a0e815779b2f83a656

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