Malicious PDF — malware analysis report

Static analysis result for SHA-256 5993387a9a29ed73…

MALICIOUS

PDF

49.2 KB Created: 2021-05-21 20:06:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9dda5dabd424cdd9fb01fe2aed37bd1b SHA-1: 59b19fa6de59c40010795426143bc4df90ab16be SHA-256: 5993387a9a29ed7319b5798cd592c7e4757fc8504b521304ac9edb728a678603
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document employs a lure related to free game items and hacks, specifically mentioning 'Roblox'. It contains multiple embedded URLs, with the primary one being `https://netcdn.xyz/app/431946152/free-roblox-gift-card-game-hack`, identified as a malicious redirector. The document body also contains text and links that reinforce this theme, suggesting the PDF is designed to trick users into visiting malicious sites. No scripts were extracted, but the PDF structure and embedded URLs strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8352

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-roblox-gift-card-game-hack In PDF document text
    • https://vstarnippers.com/images/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • https://vstarnippers.com/images/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • https://vstarnippers.com/images/coin-master-hack-app-for-ios_GM406889139.pdfIn PDF document text
    • https://vstarnippers.com/images/coin-master-links-for-free-spins_GM406889139.pdfIn PDF document text
    • https://vstarnippers.com/images/how-to-get-free-roblox-hair_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000351c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x351C 27736 bytes
SHA-256: 8a1305b39d66be4327c2410a5350ef45e467d487c437747f84c3d236e71c29fe
font_01_sfnt_off000074bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74BB 8704 bytes
SHA-256: ddfd86c88a6b8304bc31eeb9f28c8110fac325cdacc87503bacf4ac741777490
font_02_sfnt_off00009120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9120 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_03_sfnt_off00009e31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E31 18572 bytes
SHA-256: d6dd878634c6e0bfa0573f8d07d8c04072d5223543faa3ff40eccc306bc8b9ad