Malicious PDF — malware analysis report

Static analysis result for SHA-256 720a493b1aa7b0cf…

MALICIOUS

PDF

33.9 KB Created: 2021-07-06 06:52:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: bb04ef29dedac7e096fba5e340862d70 SHA-1: 7c309dc17aa2098b246310a3754da5a5a331cce3 SHA-256: 720a493b1aa7b0cf15aa805e69ae4f07e3bc6d068f0869fe33f104cde67d7150
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to lure users into clicking on "free generator" or "game hack" content, which redirect to known malicious infrastructure. The document body and embedded URLs strongly suggest a phishing or scam attempt related to popular games like Coin Master and Roblox. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious redirection, likely leading to further compromise or credential harvesting.

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 http://netcdn.tw/app/406889139/coin-master-200-spin-link-game-hack In PDF document text
    • http://studio-dentistico-fiume.com/files/free-face-roblox_GM431946152.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/robux-no-verification_GM431946152.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/roblox-free-hats_GM431946152.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/como-hackear-roblox-para-conseguir-robux_GM431946152.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/roblox-free-items-site_GM431946152.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/cheat-codes-for-hoes-roblox-song-id-bypassed_GM431946152.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/coin-master-34-4-hack-download_GM406889139.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/collect-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/coin-master-mod_GM406889139.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/how-to-get-free-minecraft-coins_GM479516143.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/roblox-kohls-admin-house-hack-script_GM431946152.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 7

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_off00002f83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F83 22248 bytes
SHA-256: 0738b49820ccec161e98bdc8dfbc914770c993dc995fde8f09f044a4d9c7c360
font_01_sfnt_off00006118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6118 18476 bytes
SHA-256: 9b5d28b427ac6d3fd2581d21508ddbe335b0d7ca2b3b27afa1e62d89566a4b6f

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