Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd1bebdcf8aa4421…

MALICIOUS

PDF

38.7 KB Created: 2021-05-22 17:06:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 97cce32aca107bb002f163c6d27ca600 SHA-1: a9fb3f57d9175dd004697a4902e65958c8a41eb9 SHA-256: bd1bebdcf8aa4421d2fadfca5560a5d1b54ae03c3415a88543f594b87db94de3
82 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating brand impersonation (Microsoft) and a call-to-action link that does not match the impersonated brand. The embedded URL `https://netcdn.xyz/app/479516143/minecraft-svg-free-game-hack` is presented as a download lure. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to lead the user to malicious content, potentially for credential phishing or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

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/479516143/minecraft-svg-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/479516143/minecraft-svg-free-game-hack PDF link annotation
    • http://nod74.ru/images/coin-master-free-spins-link-no-verification-code_GM406889139.pdfIn PDF document text
    • http://nod74.ru/images/irobux-com-redeem_GM431946152.pdfIn PDF document text
    • http://nod74.ru/images/rbx-website_GM431946152.pdfIn PDF document text
    • http://nod74.ru/images/free-spin-and-win-coin-master_GM406889139.pdfIn PDF document text
    • http://nod74.ru/images/www-claim-gg-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://freegiftcodes.euIn 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_002_off0000334b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x334B 25372 bytes
SHA-256: e31194ff47d17aebb95fd678d35992f9c01be93e5a18a0d5306b366cbc5ee2d7
font_01_sfnt_off00006cd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CD3 2840 bytes
SHA-256: 787e0768241fb57660bcc9c7f726cf687277c463cdf8c586c4782ee9d03c3606
font_02_sfnt_off00007691.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7691 17968 bytes
SHA-256: f82c060a5662ddcca675aec0cfac04b32032cde6baf3a8524f802f6fcb7e6d40

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