Malicious PDF — malware analysis report

Static analysis result for SHA-256 b440d8aa123ecd06…

MALICIOUS

PDF

36.8 KB Created: 2021-05-16 16:01:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 76a83f3826d5ee169e8fa5cb43f44681 SHA-1: 83330d3f1608bdeb941df0387c1fc476e5eeb499 SHA-256: b440d8aa123ecd0683b189345dde72b821eb8450395b1537e713213c64f0c0f0
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a known malicious infrastructure, specifically advertising a 'Roblox Free Robux No Human Verification' generator. This lure is designed to entice users to click the link, likely leading to further malicious activity such as malware downloads or phishing. No scripts were extracted, but the primary malicious functionality appears to be the redirection via the embedded URL.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • 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.
  • 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/431946152/roblox-free-robux-no-human-verification-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_off0000350b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x350B 24476 bytes
SHA-256: 9e9073036937f7f33fc296b1a09f5d360a3c2a90d81a14208e8880f3a44d70f7
font_01_sfnt_off00006cd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CD4 18932 bytes
SHA-256: 9d302b82f438100f3cf39adb1b208b926e457e77310e02e89ba7e0c774768e38

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