Malicious PDF — malware analysis report

Static analysis result for SHA-256 16ee5528b688e9fb…

MALICIOUS

PDF

42.8 KB Created: 2021-05-14 20:33:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 80fe000374b579aea6f30f778abb41a5 SHA-1: d173e955d708958229bf1c3201718910eb1de527 SHA-256: 16ee5528b688e9fbefa0b4bd849443fd1aa07d34ad459a217db218f426d6fc6a
82 Risk Score

Malware Insights

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

The PDF document contains a lure for "unlimited Robux" and impersonates Facebook, directing users to a malicious URL. The ML classifier strongly indicates maliciousness, and the presence of external URIs and brand impersonation for credential phishing points to a scam or phishing attempt. No scripts were extracted, but the document structure and embedded URLs suggest a phishing or scamming campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/how-to-get-unlimited-robux-2021-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/how-to-get-unlimited-robux-2021-game-hack PDF link annotation
    • http://dieter-sauter.com/images/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://dieter-sauter.com/images/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • http://dieter-sauter.com/images/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/how-to-get-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • http://dieter-sauter.com/images/hack-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://dieter-sauter.com/images/moon-active_GM406889139.pdfIn PDF document text
    • http://dieter-sauter.com/images/coin-master-spin-pattern_GM406889139.pdfIn PDF document text
    • http://dieter-sauter.com/images/minecraft-maps-pe-free-download_GM479516143.pdfIn PDF document text
    • http://dieter-sauter.com/images/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://dieter-sauter.com/images/coin-drop-master-free_GM406889139.pdfIn PDF document text
    • http://dieter-sauter.com/images/free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/free-robux-place_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • http://dieter-sauter.com/images/give-me-robux-now_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/minecraft-pe-apk-free-download_GM479516143.pdfIn PDF document text
    • http://dieter-sauter.com/images/wurst-client-download_GM479516143.pdfIn PDF document text
    • http://dieter-sauter.com/images/how-to-make-clothes-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/real-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/coin-master-free-spin-link-today-2021_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_off00004a51.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A51 24204 bytes
SHA-256: f6eb9bc407999bd6a92dd094f1d53f57063fe2e19d9dfa049f0aa6a453fd76ee
font_01_sfnt_off000081b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81B2 19336 bytes
SHA-256: 1d788979998456612fc8aa94ab3a8f98716d71a7de86621e0b208fb5420da083

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