Malicious PDF — malware analysis report

Static analysis result for SHA-256 16c1a5ef8c79b056…

MALICIOUS

PDF

37.2 KB Created: 2021-05-14 08:30:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: f89309f9098c9f096e03a77cf1b8a4b7 SHA-1: fbe49300f889599ca8443336816c43baaedab0d0 SHA-256: 16c1a5ef8c79b0564979a0c16f60f190ea58bc608bc849e212d7fe7a2f9af541
92 Risk Score

Malware Insights

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

The PDF file contains a link to a website advertising a "free spins coin master hack 2021 game hack". It also displays a fake CAPTCHA or human verification prompt, a common tactic to trick users into interacting with malicious content. The primary URL points to a known malicious domain associated with such lures.

Machine Learning

  • Nyx PDF Classifier clean score 0.0313

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/free-spins-coin-master-hack-2021-game-hack PDF link annotation
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000330e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x330E 26564 bytes
SHA-256: 30fecb105979cd70a0f1f856a00a36ba7535475adf529301fe3e2d981e9e850f
font_01_sfnt_off00006f6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F6A 18456 bytes
SHA-256: 8f74d6ddd2abce9f563610cbfcc253ce51c057807514da134dc64dcb58b7111e

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