Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd1253389bc65fad…

MALICIOUS

PDF

35.6 KB Created: 2021-05-14 14:02:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1cb0dc6d06d8aef690ba891d33f1824b SHA-1: 7d6b31d1d539674fae064741a12e2a0537279acc SHA-256: fd1253389bc65fad97f9e7ae41cebb5c511ce8ce4657620d52b19e11d81d16cf
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically advertising a 'Roblox Free Robux No Verification Game Hack'. The document body and heuristics indicate a lure to trick users into clicking these links. No scripts were extracted, but the presence of malicious redirector links strongly suggests a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.0265

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-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_003_off000030f2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30F2 24360 bytes
SHA-256: 40ba449dceb98a6189f1b562cdd222cf2c386ac6dd366371241ef5848668d3ae
font_01_sfnt_off00006893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6893 18676 bytes
SHA-256: d88aecf2630d4fcf6e85b9a2b5560aad6055705ec2bb19cbd5d89ce1bd292ac8

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