Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8d76bf2050c9998…

MALICIOUS

PDF

35.7 KB Created: 2021-05-25 06:38:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2295519fd2a2c6a7e615dfe2247c2b74 SHA-1: f851c295ac336eb64fca1a0ca4e621ea10ea913d SHA-256: a8d76bf2050c99987ea353d5e8c7c66c02890887f48e5fbfc9366b73408ecd26
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to a malicious URL disguised as a "free Robux generator". This lure is a common tactic to trick users into visiting potentially harmful websites. The heuristic firings confirm the malicious redirector and the lure, indicating a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.0718

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-generator-no-survey-no-download-no-human-verification-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_002_off00002df3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2DF3 24628 bytes
SHA-256: a48b291908bd603500809034c34697166779324ee4d3ac5709318ad8c22f61a0
font_01_sfnt_off00006624.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6624 19736 bytes
SHA-256: 3cea6d4f9da734904bcc55369e0b79f4621aa36195ab65246c463812034b9480

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