Malicious PDF — malware analysis report

Static analysis result for SHA-256 27a2199689d14b36…

MALICIOUS

PDF

37.1 KB Created: 2021-05-21 01:12:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: af23e3b18000960e46df3fe5c14f694c SHA-1: 852f218e6c00507ab6281789a0bb1c135766db97 SHA-256: 27a2199689d14b36cf1bc644db984a7b28b8a1a2a5c8f79a7e79872fa942001c
82 Risk Score

Malware Insights

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

The PDF document contains lures for 'Free Robux' and impersonates the PayPal brand, directing users to a malicious URL. The presence of embedded URLs and a call-to-action button suggests an attempt to trick the user into downloading or visiting a malicious site. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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-robux-no-survey-or-human-verification-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-robux-no-survey-or-human-verification-game-hack PDF link annotation
    • http://beautyforyou.fr/images/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://beautyforyou.fr/images/coin-master-free-spins-app-android_GM406889139.pdfIn PDF document text
    • http://beautyforyou.fr/images/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
    • http://beautyforyou.fr/images/free-coins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://beautyforyou.fr/images/coin-master-mod-version-free-download-34-4_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_off0000324f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x324F 25196 bytes
SHA-256: 86899c1c95ba88fe5f7a563b5b5c13497a9bc65f5f0cbd5e56763e490cf75afd
font_01_sfnt_off00006cf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CF2 19156 bytes
SHA-256: 740843b016d65d6d98e94234348adfc338e782053996300107113ffe61ddc4f5

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