Malicious PDF — malware analysis report

Static analysis result for SHA-256 da4c005af59b02c7…

MALICIOUS

PDF

36.9 KB Created: 2021-05-17 20:32:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b89645ba160c56e2c9ca23ea7852b29c SHA-1: 63af35ed0c7fbd3288e0e037318b3018ad26647c SHA-256: da4c005af59b02c746f08acbd4b6c53fbe3e2526e9e4d54382bd4573881ea555
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links and text explicitly advertising a "Free Robux Hack" and a "Roblox Generator", directing users to a known malicious redirector URL. The presence of these lures and the redirection to malicious infrastructure strongly suggests a phishing or scam attempt, likely delivered as an attachment. No scripts were extracted, but the document's content and linked URL are sufficient indicators of malicious intent.

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/free-robux-hack-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000305c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x305C 27044 bytes
SHA-256: 0b554097ffe3d4b7d676b8a206bf48a1e6e77231e12b10497f2cac6e1fc02a04
font_01_sfnt_off00006eb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EB1 18412 bytes
SHA-256: 8090616d8a5c0701bec53dfbbcc7430816d9db69864bd7c9067c717eb12c26b4

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