Malicious PDF — malware analysis report

Static analysis result for SHA-256 5128161e2fac5f19…

MALICIOUS

PDF

41.1 KB Created: 2021-05-24 06:06:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8c9d038b9af7cc23c4cb4dc15321a851 SHA-1: 23e45cc0b96974a45176a514468d801ef41c961e SHA-256: 5128161e2fac5f191efd5661be319b3a4d357f509ebb97f4e263081a65d83a9d
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 0.7471

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/406889139/haktuts-coin-master-free-daily-spins-game-hack PDF link annotation
    • http://metatg.com.ua/images/coin-master-hack-tool-without-human-verification_GM406889139.pdfIn PDF document text
    • http://metatg.com.ua/images/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://metatg.com.ua/images/how-to-hack-coins-in-archery-master-3d_GM406889139.pdfIn PDF document text
    • http://metatg.com.ua/images/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://metatg.com.ua/images/uprobuxcom-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
stream_002_off00003235.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3235 28644 bytes
SHA-256: b99bd73bfb4eea53d8e443e302aed4bc0deedad6c6cb5e4f0fb37839e5ecdfac
font_01_sfnt_off000074a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74A5 2868 bytes
SHA-256: d2d857e2ddc1082c7667b23f2135a5c0ba26a2ff8b42c86c89c8e0b09aece855
font_02_sfnt_off00007e8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E8F 18620 bytes
SHA-256: ded7de44f7a870837d4ef416985ae0b9ef78dce3540f45b1558d033e63b05ca7

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