Malicious PDF — malware analysis report

Static analysis result for SHA-256 4957219353cb9c6d…

MALICIOUS

PDF

41.8 KB Created: 2021-06-03 17:14:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: bb1631bbbb248a876d781b74060c7d8b SHA-1: 701f1976f99fc67fcb2600c8cd962a18c1ec593d SHA-256: 4957219353cb9c6dc0569cbf428ad2134c494aac4f9990b1c20e6f0ded00c376
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 0.0125

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.online/app/431946152/how-to-get-free-robux-on-pc-game-hack PDF link annotation
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000036e6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x36E6 28312 bytes
SHA-256: f9d1d4a494f491210b4d400dd90c2084727eeeaf9d09cfa4db0fcd37cf3a787a
font_01_sfnt_off0000762b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x762B 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off0000833d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x833D 17968 bytes
SHA-256: 8b82ed3cadbbe2c50183ae8a6da2409c763150934f66b6873dbb3bac4d48b802

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