Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c2991bd0ef4af6f…

MALICIOUS

PDF

37.1 KB Created: 2021-05-12 18:04:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: eb364e8a22a32b2836cadc42859f9830 SHA-1: 719a644bf33a3712de21f6385a9d31fb4db50b66 SHA-256: 5c2991bd0ef4af6f56efd4703a02eeb469d8a9e477289340569477e2bf8229ce
92 Risk Score

Malware Insights

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

This PDF document was flagged as malicious. It uses a fake-CAPTCHA lure. 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 clean score 0.0129

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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/roblox-g-game-hack PDF link annotation
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00002e6f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E6F 24788 bytes
SHA-256: 370f32b27c22a12cb4425b84da37b9a5d40a64e4e7ab9d2b9ae2dcc93bee0f59
font_01_sfnt_off00006701.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6701 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off000070b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70B2 17784 bytes
SHA-256: 4bd2d0041dee7b7796a1d14ead449b1e4ac2afb962c20115eab39ba9eb76df9f

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