Malicious PDF — malware analysis report

Static analysis result for SHA-256 b11654f6a6fbf1d0…

MALICIOUS

PDF

39.1 KB Created: 2021-05-22 02:05:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 056fe3b675303c957ae18a1f0bd071f5 SHA-1: a9d5c02232795f61f64011380d6d80a0bdfe0484 SHA-256: b11654f6a6fbf1d09eb1ec3a53efb9587007ec06cb5b7e47dd51803837b47f6b
122 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. It uses brand-impersonation credential phishing. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8068

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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-script-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-script-game-hack PDF link annotation
    • http://mbbs.hr/files/roblox-download-pc-free_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/hack-client_GM479516143.pdfIn PDF document text
    • https://mbbs.hr/files/free-robux-live_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/apps-to-get-free-robux_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_off0000322f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x322F 24420 bytes
SHA-256: 8e07210a03a8861ac1130e30613aff0090107a5303ec548bbedc118e4cc802fa
font_01_sfnt_off00006a18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A18 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_02_sfnt_off000076bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76BF 18416 bytes
SHA-256: 7904477eb6282cb79bb1f8d95588be1a5283b3abf5667e30a4d761915d4b26ef

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