Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a4b6f5a767cfd77…

MALICIOUS

PDF

35.5 KB Created: 2021-05-22 19:40:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0573447c005fa5e859c5ae5e01e00165 SHA-1: 237baefe6b75bb604dc0aaf573576a5902970868 SHA-256: 5a4b6f5a767cfd7728a396cc33a6d94decf7177dac74d764503c0e49b84da6a3
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 0.9492

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/431946152/rblx-city-free-robux-game-hack PDF link annotation
    • http://www.habitas.it/images/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://www.habitas.it/images/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://www.habitas.it/images/coin-master-spin-rewards_GM406889139.pdfIn PDF document text
    • http://www.habitas.it/images/minecraft-free-computer-game_GM479516143.pdfIn PDF document text
    • http://www.habitas.it/images/free-robux-that-actually-works-2021_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_002_off0000313a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x313A 24608 bytes
SHA-256: 038b4872da9eefe0b7b2411dd0284f755662dd917ea4d5fad4745896cdba7447
font_01_sfnt_off000068e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68E9 18492 bytes
SHA-256: 8c36c54b235ee774b4288e3a660071bec0b4f54d4ae0ca28de0be66b92090129

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