Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9d937b0769a2ecd…

MALICIOUS

PDF

33.5 KB Created: 2021-06-20 19:25:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: e4f266c4a831c4c7046354a0cf0d11f5 SHA-1: a18c63ff24d7c3c2cf2ab9fb32890ecbd687a018 SHA-256: c9d937b0769a2ecd4d71d4d207f7a3517f7cb7f6b709ede97d8ff349927ebb82
82 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs and text referencing "free Robux" and "free coins," impersonating brands like Netflix to lure users. The primary malicious URL, http://netcdn.co/app/431946152/best-games-to-hack-on-roblox-game-hack, is associated with a credential phishing or malware download lure. The ML classifier strongly flagged this PDF as malicious, supporting the observed phishing and potential payload delivery techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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/best-games-to-hack-on-roblox-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/best-games-to-hack-on-roblox-game-hack PDF link annotation
    • http://anna-art.in.ua/images/free-coin-master-coins-2021_GM406889139.pdfIn PDF document text
    • http://anna-art.in.ua/images/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://anna-art.in.ua/images/new-oilgarchy-hack-roblox_GM431946152.pdfIn PDF document text
    • http://anna-art.in.ua/images/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://anna-art.in.ua/images/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
    • http://anna-art.in.ua/images/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://anna-art.in.ua/images/minecraft-free-computer-game_GM479516143.pdfIn PDF document text
    • http://anna-art.in.ua/images/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://anna-art.in.ua/images/coin-master-free-spin-download_GM406889139.pdfIn PDF document text
    • http://anna-art.in.ua/images/free-robux-working-2021_GM431946152.pdfIn PDF document text
    • http://anna-art.in.ua/images/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • http://anna-art.in.ua/images/coin-master-free-spins-fb_GM406889139.pdfIn PDF document text
    • http://anna-art.in.ua/images/how-to-get-free-robux-in-seconds-2021_GM431946152.pdfIn PDF document text
    • http://anna-art.in.ua/images/hack-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://anna-art.in.ua/images/coin-master-free-spins-save_GM406889139.pdfIn PDF document text
    • http://anna-art.in.ua/images/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • http://anna-art.in.ua/images/youtube-free-items-roblox_GM431946152.pdfIn PDF document text
    • http://anna-art.in.ua/images/roblox-hacking-cheat-engin_GM431946152.pdfIn PDF document text
    • http://anna-art.in.ua/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://anna-art.in.ua/images/minecraft-java-edition-free-code_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_off00002e1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E1B 21696 bytes
SHA-256: 59acb12925a60bb8ea34b2c1c61e1f8e2312dddf38bb87679d58b9689a5bf0bc
font_01_sfnt_off00005dca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DCA 19020 bytes
SHA-256: f400bc6bfdf5473944caee2fa1ac7e63386fc431494102f209329d4d23208f23

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