Malicious PDF — malware analysis report

Static analysis result for SHA-256 b54344dfc5588580…

MALICIOUS

PDF

43.8 KB Created: 2021-05-17 13:04:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 7f616664dec457759445a118e648ce39 SHA-1: fdafd604a7a683901783173e69c2fcffb09ac04e SHA-256: b54344dfc558858016aa9f040db438d07a6e44e8f5e92543483a0dfe2e858139
82 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and a document body that explicitly mentions 'Free Robux' and impersonates Netflix to lure users. The heuristic 'SE_BRAND_CREDENTIAL_PHISH' confirms this, noting the call-to-action link host does not match the impersonated brand. The ML classifier strongly flagged this PDF as malicious. While no scripts were extracted, the presence of malicious URLs suggests the document is designed to lead the user to a site that may host further malicious content or attempt credential theft.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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-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/431946152/free-robux-for-free-game-hack PDF link annotation
    • http://brokermortgages.com/images/robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://brokermortgages.com/images/coin-master-hack-apk-2021-ios_GM406889139.pdfIn PDF document text
    • http://brokermortgages.com/images/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://brokermortgages.com/images/roblox-lovenet_GM431946152.pdfIn PDF document text
    • http://brokermortgages.com/images/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • http://brokermortgages.com/images/roblox-but_GM431946152.pdfIn PDF document text
    • http://brokermortgages.com/images/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://brokermortgages.com/images/how-to-hack-coins-in-mcpe-master_GM406889139.pdfIn PDF document text
    • http://brokermortgages.com/images/free-coins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://brokermortgages.com/images/earn-free-robux_GM431946152.pdfIn PDF document text
    • http://brokermortgages.com/images/links-to-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://brokermortgages.com/images/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://brokermortgages.com/images/free-minecraft-maps_GM479516143.pdfIn PDF document text
    • http://brokermortgages.com/images/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://brokermortgages.com/images/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://brokermortgages.com/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://brokermortgages.com/images/coin-master-daily-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • http://brokermortgages.com/images/coin-master-hack-ios-download_GM406889139.pdfIn PDF document text
    • http://brokermortgages.com/images/gamesofficenet-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://brokermortgages.com/images/how-can-you-get-free-spins-on-coin-master_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_003_off000047a4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47A4 29652 bytes
SHA-256: 763618091ed1cda67f95e90cb5fbb2e202ba322720e572ae30660c60d0822fc4
font_01_sfnt_off000089f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89F7 18012 bytes
SHA-256: 3ef9e48aa3d97d4217e004f7625a8cbae9320a74231b80a01553f6433e422360

Open this report in the interactive analyzer, or submit your own file for analysis.