Malicious PDF — malware analysis report

Static analysis result for SHA-256 98e79b6ab0f08b5d…

MALICIOUS

PDF

39.5 KB Created: 2021-05-10 12:04:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 29a2c9bdaa73cc074ae5a8ad89bdebe0 SHA-1: d33c6aad7a8de5868c7d9ae6bdc39c072417e321 SHA-256: 98e79b6ab0f08b5d1c2b16ea10e069bbda92fe2063822488ae101a893b80834f
92 Risk Score

Malware Insights

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

The PDF file contains a lure related to 'Coin Master Free Spin And Coin Links' and a 'CLICK HERE TO ACCESS COIN MASTER GENERATOR' call to action. It links to a URL identified as a game hack redirector, which is a common tactic for phishing or malware distribution. The presence of a fake CAPTCHA heuristic further suggests an attempt to trick the user into interacting with the malicious content.

Machine Learning

  • Nyx PDF Classifier clean score 0.0128

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/406889139/coin-master-free-spin-and-coin-links-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_off00003690.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3690 24376 bytes
SHA-256: 0d2f99c39248dc1c9fb54a2b2e5983f9b3633630f12f06431295d3f6dabefda8
font_01_sfnt_off00006e51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E51 3124 bytes
SHA-256: 9967c6221325a4ff3f7c4336922605f990450164c2eee2df708cc81823c6ec98
font_02_sfnt_off0000792f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x792F 18228 bytes
SHA-256: ab1c4cdc214a6baf81a15e2f62a40ea9cfbbbf407f0f3dd1c7564e467cf0dae2

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