Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceb2337fdac92e63…

MALICIOUS

PDF

44.7 KB Created: 2021-06-02 12:48:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: e03574583a47fd3d0d6d8e05e6eebf50 SHA-1: 35eede04583c2f4f6d8d6cdeee542d62a25317ae SHA-256: ceb2337fdac92e63d87b49af2844e52f4622be110917a7761e4c29e4416bdaf9
82 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and heuristics indicate a brand-impersonation credential phishing lure, specifically impersonating Paypal. The primary malicious URL identified is https://netcdn.xyz/app/431946152/free-roblox-account-givaway-game-hack, which is presented as a giveaway. The document's content and the presence of external URIs suggest an attempt to trick the user into visiting a malicious site, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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: https://netcdn.xyz/app/431946152/free-roblox-account-givaway-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 https://netcdn.xyz/app/431946152/free-roblox-account-givaway-game-hack PDF link annotation
    • https://xiangquan.com.tw/image/data/files/how-to-win-attack-madness-in-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/moonactive-free-spins_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-get-minecraft-java-free_GM479516143.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-change-your-name-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/minecraft-fly-hack_GM479516143.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-get-cheap-pubg-uc_GM1330123889.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-minecraft-capes-no-mods_GM479516143.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/roblox-skins-boy-free_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/earn-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/what-is-robux_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-coin-master-account_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-admin-free-spins_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/wurst-hacked-client_GM479516143.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/robux-free-com_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
stream_004_off000050e2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50E2 24956 bytes
SHA-256: f751339ebcb55a3cfef1c4499997bf0c92331e0a41bb09d349e414b929c42a04
font_01_sfnt_off000089d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89D1 19000 bytes
SHA-256: a639c14a0c87c138b8cd5e7c52873a59946962201b374ffa7e81ff6c45ea3def

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