Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fb2075e002dcb1c…

MALICIOUS

PDF

36.2 KB Created: 2021-05-20 21:45:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: f2d46a3fbf7f0444f72a907d195c8a74 SHA-1: 1e53512814761436198dd40f84d190f99a0c6f1b SHA-256: 8fb2075e002dcb1cadbb534edbcfebc892a09f9897549090242d3dc12d60bd61
82 Risk Score

Malware Insights

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

The PDF document contains a lure impersonating Facebook to trick users into clicking a link for a 'TikTok generator'. The embedded URL and other linked PDFs point to domains associated with potentially malicious content, suggesting a credential phishing or malware distribution attempt. No scripts were extracted, but the presence of external URIs and brand impersonation heuristics strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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/watch-tiktok-for-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/watch-tiktok-for-free-game-hack PDF link annotation
    • https://vstarnippers.com/images/games-in-roblox-that-give-you-robux_GM431946152.pdfIn PDF document text
    • https://vstarnippers.com/images/free-robux-generator-codes_GM431946152.pdfIn PDF document text
    • https://vstarnippers.com/images/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://vstarnippers.com/images/minecraft-education-edition-free-download_GM479516143.pdfIn PDF document text
    • https://vstarnippers.com/images/coin-master-apk-free-download_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
stream_002_off00002ffb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FFB 27596 bytes
SHA-256: acedc7bf4d2ffe103bccfb75e699f8654c69687d1dcc902d52d6c321972e84ed
font_01_sfnt_off00006cd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CD5 18048 bytes
SHA-256: 536dd0f2ccb369fb0f75028f7438263e518d9053b8109dbcfe1c6d16044e23ce

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