Malicious PDF — malware analysis report

Static analysis result for SHA-256 85d4d000d96dd988…

MALICIOUS

PDF

36.1 KB Created: 2021-05-13 05:31:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 50941265b2a1c4a839ff06bb998f4fe2 SHA-1: d2d33a62168394e1743cc5fa8769224edbc388e6 SHA-256: 85d4d000d96dd988f861f553ddf25e585f0e1e931ad9912db757d076f72c4c00
110 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA and a "CLICK HERE TO ACCESS COIN MASTER GENERATOR" call-to-action, which are common social engineering tactics to lure users into clicking malicious links. The embedded URL, https://netcdn.xyz/app/406889139/legit-coin-master-hack-site-zyngaplayerforums.com-game-hack, is flagged as malicious, indicating the document's intent to redirect users to harmful infrastructure. The use of wkhtmltopdf suggests the document may have been generated from web content, potentially to mask its malicious nature.

Machine Learning

  • Nyx PDF Classifier clean score 0.0283

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/legit-coin-master-hack-site-zyngaplayerforums.com-game-hack In PDF document text
    • 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_off0000314f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x314F 24680 bytes
SHA-256: d16cf476c51b6ec201fdddc7a6883cf1c6f5eb667fd901ba5bb60319e9c7732d
font_01_sfnt_off0000699e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x699E 18996 bytes
SHA-256: c7201ec4c3a8de5860eeb2e6c9e6c90ee147184e9a3338a06e2bc3af5219e027

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