Malicious PDF — malware analysis report

Static analysis result for SHA-256 49d68a9f492dc0bf…

MALICIOUS

PDF

34.5 KB Created: 2021-06-28 03:08:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: fb43ef82439770512e81303ae39859ed SHA-1: 107157aef23afc95a1e4b4d52c5aa94498f744b2 SHA-256: 49d68a9f492dc0bfad4040d176baffc0a274f5806f681bebd878afea90019c55
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, identified as a link farm, that direct users to websites offering free in-game currency or hacks for popular games like Roblox and Coin Master. The primary URL, http://netcdn.co/app/431946152/rich-account-password-free-robux-included-game-hack, is likely a malicious landing page designed to exploit user interest in these topics. The ML classifier strongly indicated maliciousness, supporting the conclusion that this document is part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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/rich-account-password-free-robux-included-game-hack PDF link annotation
    • http://www.hlad.hr/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/coin-master-unlimited-spins_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/roblox-svg-free_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/free-mods-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://www.hlad.hr/files/coin-master-vip-hack_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/how-to-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://www.hlad.hr/files/coin-master-heaven-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/coin-master-heaven-links_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/minecraft-free-download-pc_GM479516143.pdfIn PDF document text
    • http://www.hlad.hr/files/minecraft-pe-free-download-android_GM479516143.pdfIn PDF document text
    • http://www.hlad.hr/files/coin-master-hack-pc-free_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/hack-stats-on-roblox-game_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://www.hlad.hr/files/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/coin-master-hack-without-human-verification-2021_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_off00002dab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DAB 22468 bytes
SHA-256: 640dad16a415f9e52d3f9eaaac27b2fbe41862718b1a41e8a46fe7af63a28c2a
font_01_sfnt_off0000601d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x601D 19672 bytes
SHA-256: dab6d223b17b42df62c458adc5c503821b811ef243e7857dd9d7deb9f2c6c610

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