Malicious PDF — malware analysis report

Static analysis result for SHA-256 89b04d7ee09ea94d…

MALICIOUS

PDF

38.5 KB Created: 2021-05-10 13:35:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ee928774879a13047e87f9429b72c107 SHA-1: 178cef737f65ec93a0f559e2ad380aa4dcf101eb SHA-256: 89b04d7ee09ea94de8ecda568f8a40165db7a53695e8494cc44478ba3bbb8eda
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. 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 0.9408

Heuristics 4

  • 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.
  • 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/free-minecraft-account-reddit-game-hack PDF link annotation
    • http://solidcom.de/images/whats-robux_GM431946152.pdfIn PDF document text
    • http://solidcom.de/images/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://solidcom.de/images/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://solidcom.de/images/robux-rewards_GM431946152.pdfIn PDF document text
    • http://solidcom.de/images/free-robux-apps-that-work_GM431946152.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_off00003bd4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3BD4 25728 bytes
SHA-256: 21216afc4ca2953cf9775aafa4c96f76636a8500fcb43604600602f5e5a7b2dd
font_01_sfnt_off000075bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75BB 18024 bytes
SHA-256: 06706ad336338b7ad3fbc0c92e8d54cad43b148c9035f6d20b1c8b9e0858b525

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