Malicious PDF — malware analysis report

Static analysis result for SHA-256 18b9b32aca4f3b0c…

MALICIOUS

PDF

44.7 KB Created: 2021-05-11 17:40:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: daa1cfc3c66c56d348f5e88131b87290 SHA-1: a2c9f32858ad7b49f57d8c09d3fd1e10e6038dd9 SHA-256: 18b9b32aca4f3b0cbe95b4881b630842129b205f7d770dc3bda0a0abee915af4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with promises of game hacks and free currency. The primary link directs to a site offering a 'hack coin master app'. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or malware distribution attempt, likely using embedded JavaScript for redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/hack-coin-master-app-ios-game-hack In PDF document text
    • http://eltisstudio.sk/images/free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/coin-master-free-spin-whatsapp-group_GM406889139.pdfIn PDF document text
    • http://eltisstudio.sk/images/free-spin-app-for-coin-master_GM406889139.pdfIn PDF document text
    • http://eltisstudio.sk/images/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://eltisstudio.sk/images/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://eltisstudio.sk/images/minecraft-modded-client_GM479516143.pdfIn PDF document text
    • http://eltisstudio.sk/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://eltisstudio.sk/images/free-minecraft-generator_GM479516143.pdfIn PDF document text
    • http://eltisstudio.sk/images/coin-master-free-spin-bonus_GM406889139.pdfIn PDF document text
    • http://eltisstudio.sk/images/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/coin-master-free-spins-link-haktuts_GM406889139.pdfIn PDF document text
    • http://eltisstudio.sk/images/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://eltisstudio.sk/images/free-roblox-followers_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://eltisstudio.sk/images/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://eltisstudio.sk/images/roblox-generator-no-human-verification_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
stream_003_off00004b60.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B60 30136 bytes
SHA-256: 6ab474647481e997490a60d0ea7a81bbe6f94eed872108efff4c3d5a18e25767
font_01_sfnt_off00008de5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DE5 17892 bytes
SHA-256: db4cb0e5038e40aae5db0274b23e1c53a74243cd1ac5b16be32cf562ede0c44a

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