Malicious PDF — malware analysis report

Static analysis result for SHA-256 658aac0e16b69b4a…

MALICIOUS

PDF

36.5 KB Created: 2021-05-22 05:07:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b537f3ea42bd3a3fa7a681413337f710 SHA-1: 2941b69991590f819a03ca579082fa916efe074f SHA-256: 658aac0e16b69b4a5eacb671296b8c7dcb75de0040c4c424071b78c3ff496a8f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising 'free Robux' or 'game hacks' to lure victims. The primary malicious URL identified is https://netcdn.xyz/app/431946152/free-robux-without-verification-game-hack. The document body and embedded links suggest a phishing or scam attempt, likely leading to further malware download or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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-without-verification-game-hack In PDF document text
    • https://itamleek.net/uploaded_files/userfiles/files/pokemon-go-free-joystick-android_GM1094591345.pdfIn PDF document text
    • https://itamleek.net/uploaded_files/userfiles/files/roblox-redeem-card-codes-free_GM431946152.pdfIn PDF document text
    • https://itamleek.net/uploaded_files/userfiles/files/roblox-cp_GM431946152.pdfIn PDF document text
    • https://itamleek.net/uploaded_files/userfiles/files/free-roblox-premium_GM431946152.pdfIn PDF document text
    • https://itamleek.net/uploaded_files/userfiles/files/buy-robux-free_GM431946152.pdfIn 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
font_00_sfnt_off000032fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32FD 24664 bytes
SHA-256: a17f23475f3df0c397947d034041df73abe26a35cfa228f092eabb5d51a84840
font_01_sfnt_off00006b46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B46 18964 bytes
SHA-256: 5864977637737ef4e1bd5b7bfc66e5602b8aa3d3ed60f74fb5f96fd63c3aa8ef

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