Malicious PDF — malware analysis report

Static analysis result for SHA-256 b970c1d628cfc0ce…

MALICIOUS

PDF

34.9 KB Created: 2021-07-05 07:11:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 383df5247584e6733db1d9926837b781 SHA-1: aa5ea450e5513f7a30875f2795f457bf85c274bd SHA-256: b970c1d628cfc0ce5cecb841de41250c8d0983c4cc068a7f705aecd68e7f1fd9
102 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are hosted on domains associated with game hacks and free in-game currency lures. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs and a 'download button' heuristic further supports a malicious intent to redirect users to potentially harmful content. No scripts were extracted from this sample.

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.tw/app/479516143/minecraft-windows-10-free-game-hack PDF link annotation
    • https://javexglobal.com/image/data/files/coin-master-facebook-free-spins_GM406889139.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/free-robux-inspect-element-2021_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/hack-boku-no-hero-academia-roblox-espaol_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/free-robux-no-human-verification-and-no-survey-2021_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/roblox-robux-hack-no-survey-2021_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/download-coin-master-apk-hack_GM406889139.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/mine-minecraft-games-for-free_GM479516143.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/roblox-free-jailbreak-vip-server_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/free-spins-link-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/microsoft-store-robux_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/coin-master-free-spin-app-reviews_GM406889139.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/minecraft-windows-10-key-free_GM479516143.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/free-minecraft-java-edition-codes_GM479516143.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/roblox-games-com-free_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/redeem-code-roblox-free-robux-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_off0000324a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x324A 22412 bytes
SHA-256: 73d0e26f6259891316d639ec11d92c7932075a4a62f75d951e4eb592ea9ca237
font_01_sfnt_off000063e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63E8 18812 bytes
SHA-256: 64384bfcc58c1bbdf03ee3f883a0be16d7cce96ae7e77f1df9d799b764379cfd

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