Malicious PDF — malware analysis report

Static analysis result for SHA-256 07c4032e15d73d65…

MALICIOUS

PDF

44.9 KB Created: 2021-05-13 11:24:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7afb23773d290500a0f1d3804e2ac039 SHA-1: 57e4cc7f74c45a462d1e99902193f7019559095b SHA-256: 07c4032e15d73d65f22670ba74c95592dbb1e8306fffb20077db4855ddb9ca0f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The document body and embedded URLs suggest a phishing attempt designed to trick users into visiting potentially harmful sites. No scripts were extracted, but the presence of malicious redirector links and the ML classifier output strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/406889139/how-to-get-free-daily-spins-on-coin-master-game-hack In PDF document text
    • http://cristalysoptic.com/images/when-was-minecraft-free_GM479516143.pdfIn PDF document text
    • http://cristalysoptic.com/images/free-custom-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://cristalysoptic.com/images/coun-master_GM406889139.pdfIn PDF document text
    • http://cristalysoptic.com/images/promo-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://cristalysoptic.com/images/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • http://cristalysoptic.com/images/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • http://cristalysoptic.com/images/minecraft-handbook_GM479516143.pdfIn PDF document text
    • http://cristalysoptic.com/images/how-to-get-minecraft-bedrock-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://cristalysoptic.com/images/free-robux-just-enter-username-and-password_GM431946152.pdfIn PDF document text
    • http://cristalysoptic.com/images/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://cristalysoptic.com/images/earn-roblox_GM431946152.pdfIn PDF document text
    • http://cristalysoptic.com/images/coin-master-400-spin-link-hack_GM406889139.pdfIn PDF document text
    • http://cristalysoptic.com/images/how-to-get-free-clothes-on-roblox_GM431946152.pdfIn PDF document text
    • http://cristalysoptic.com/images/get-free-roblox_GM431946152.pdfIn PDF document text
    • http://cristalysoptic.com/images/scaffold-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://cristalysoptic.com/images/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://cristalysoptic.com/images/offers-for-robux_GM431946152.pdfIn PDF document text
    • http://cristalysoptic.com/images/how-to-hack-coin-master-apple_GM406889139.pdfIn PDF document text
    • http://cristalysoptic.com/images/free-roblox-glasses_GM431946152.pdfIn PDF document text
    • http://cristalysoptic.com/images/coin-master-online-hack-tool_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000486e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x486E 26284 bytes
SHA-256: fc4a772939fd50d46a096b5a7f2d5e9f4541837bfc8523867fb9dce207dcaaaa
font_01_sfnt_off0000821b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x821B 2924 bytes
SHA-256: ac3269c20017f71c8694a49264365a808650333b0ed34827541dea5399831fb3
font_02_sfnt_off00008c2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C2F 18472 bytes
SHA-256: 16a7f242fb8c09a8aee24ffe7eff7301392850b549ae588808710575930a759c

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