Malicious PDF — malware analysis report

Static analysis result for SHA-256 87aaa07d9286f518…

MALICIOUS

PDF

44.7 KB Created: 2021-05-16 14:44:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9565e0fc40b07a036bbace3a5414943c SHA-1: f7f85c612efe439e1415dfe65ab99d83e08ccca2 SHA-256: 87aaa07d9286f518b048a0a3b0ca02b32bfa8b76043ce4720da743d7907a7890
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically advertising 'game hacks' and 'free spins' to lure users. The primary redirector identified is 'https://netcdn.xyz/app/406889139/coin-master-facebook-game-hack'. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering attack aimed at driving traffic to malicious sites, likely for further payload delivery or phishing.

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/coin-master-facebook-game-hack In PDF document text
    • http://wirelesscommsys.com/images/free-texture-packs-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://wirelesscommsys.com/images/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://wirelesscommsys.com/images/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • http://wirelesscommsys.com/images/coin-master-free-spins-2021-ios_GM406889139.pdfIn PDF document text
    • http://wirelesscommsys.com/images/roblox-hack-client_GM431946152.pdfIn PDF document text
    • http://wirelesscommsys.com/images/coin-master-free-gold_GM406889139.pdfIn PDF document text
    • http://wirelesscommsys.com/images/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://wirelesscommsys.com/images/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://wirelesscommsys.com/images/minecraft_GM479516143.pdfIn PDF document text
    • http://wirelesscommsys.com/images/roblox-adopt-me-hack_GM431946152.pdfIn PDF document text
    • http://wirelesscommsys.com/images/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://wirelesscommsys.com/images/minecraft-menu_GM479516143.pdfIn PDF document text
    • http://wirelesscommsys.com/images/minecraft-pe-mod-menu_GM479516143.pdfIn PDF document text
    • http://wirelesscommsys.com/images/free-robux-rewards_GM431946152.pdfIn PDF document text
    • http://wirelesscommsys.com/images/wizard-hacks_GM479516143.pdfIn PDF document text
    • http://wirelesscommsys.com/images/get-more-robux_GM431946152.pdfIn PDF document text
    • http://wirelesscommsys.com/images/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://wirelesscommsys.com/images/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://wirelesscommsys.com/images/roblox-adopt-me-free-pets_GM431946152.pdfIn PDF document text
    • http://wirelesscommsys.com/images/free-roebucks-com_GM431946152.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_off00004aee.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AEE 24880 bytes
SHA-256: 525b1c808afc28bb715331d365bf6e50f5e602b7c5152910d3cca32a24d4b1bc
font_01_sfnt_off00008342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8342 2824 bytes
SHA-256: 381f6d859be141449dd645f7be1484d2a1cf49218dc471b402dae69eaa2b11d5
font_02_sfnt_off00008ce4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CE4 18040 bytes
SHA-256: 84f206db0752fc1b1c3d9ee3ef2c899a5b2ff620242448cfed824ad49df6ef2c

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