Malicious PDF — malware analysis report

Static analysis result for SHA-256 564eabe3af4e5f9e…

MALICIOUS

PDF

43.9 KB Created: 2021-05-21 07:16:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: b07a7e275bfb4b95f95b04e3b10816ee SHA-1: 6a3c45670daba09ba4f2bf010bd678a0cfd00c4f SHA-256: 564eabe3af4e5f9ee806fbb4a6c0307ff05a5a21d250e6ba6fa9119af89cbf78
102 Risk Score

Malware Insights

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

The sample is a PDF document that impersonates Microsoft and uses a "Robux Hack" lure to trick users into clicking a malicious link. The document body contains text and links related to "Robux Hack" and "Roblox Generator", directing users to external URLs. The ML classifier flagged this PDF as malicious with a high score, and heuristics indicate brand impersonation for credential phishing and the presence of external URIs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7281

Heuristics 5

  • 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/robux-hack-no-human-verification-game-hack.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/robux-hack-no-human-verification-game-hack PDF link annotation
    • https://www.letapbiosolutions.com/uploaded_files/userfiles/files/roblox-free-draw_GM431946152.pdfIn PDF document text
    • https://www.letapbiosolutions.com/uploaded_files/userfiles/files/coin-master-free-spin-app-iphone_GM406889139.pdfIn PDF document text
    • https://www.letapbiosolutions.com/uploaded_files/userfiles/files/free-links-for-free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.letapbiosolutions.com/uploaded_files/userfiles/files/robux-for-offers_GM431946152.pdfIn PDF document text
    • https://www.letapbiosolutions.com/uploaded_files/userfiles/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn 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
font_00_sfnt_off00003363.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3363 29436 bytes
SHA-256: eec862e5bb0a077188875da6d74a11acbc41a983efc514e48f9b1b8dce1c5b9d
font_01_sfnt_off0000786a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x786A 6768 bytes
SHA-256: fa93de321190668b294ff46149e4b98ac349b4fd022dcee9ecd964f7f59f3f9a
font_02_sfnt_off000088a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88A9 18868 bytes
SHA-256: 8c41f3ed2032476b4a245afad5cd23074bff3a00c17c7f8f9be8353034b253b9

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