Malicious PDF — malware analysis report

Static analysis result for SHA-256 089217aa0cb786d3…

MALICIOUS

PDF

43.9 KB Created: 2021-05-19 17:08:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 2eb1470dce441b284c2171f34b2d4295 SHA-1: 9b72289437d8b8bd33fae6e46ce6bd16af32f627 SHA-256: 089217aa0cb786d39c43111df133e2b6367eca6b502473f91a64898f9fa7a204
82 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a credential phishing lure, impersonating Microsoft to trick users into clicking a link. The embedded link, https://netcdn.xyz/app/835599320/how-is-tiktok-free-game-hack, is hosted on a domain unrelated to the impersonated brand, indicating a likely phishing attempt. While no scripts were directly extracted, the ML classifier and the presence of external URIs suggest malicious intent, potentially leading to the download of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/835599320/how-is-tiktok-free-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/835599320/how-is-tiktok-free-game-hack PDF link annotation
    • http://gruporamos.do/images/roblox-re_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/is-minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://gruporamos.do/images/best-free-roblox-executor_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • http://gruporamos.do/images/how-to-change-your-roblox-username-for-free_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/how-can-i-get-robux_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://gruporamos.do/images/minecraft-mac-free_GM479516143.pdfIn PDF document text
    • http://gruporamos.do/images/minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://gruporamos.do/images/android-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://gruporamos.do/images/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://gruporamos.do/images/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/get-free-spins-on-coin-master-links_GM406889139.pdfIn PDF document text
    • http://gruporamos.do/images/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a21.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A21 24056 bytes
SHA-256: 7195c7bcbcfa765f826b125c9d12227e7da455997d45493917b2f54b1fb98d34
font_01_sfnt_off00008114.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8114 2896 bytes
SHA-256: c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
font_02_sfnt_off00008afa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AFA 17620 bytes
SHA-256: b5ce23b9273ad848bb71587da7b8423b4f5bd9686f8f525358d4ac4dd93df6c0

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