Malicious PDF — malware analysis report

Static analysis result for SHA-256 b502a37a438da1fd…

MALICIOUS

PDF

47.2 KB Created: 2021-06-09 14:22:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 965b630b5c902b39e6bb1b1da1e69128 SHA-1: bda7c012ecb35498146bc87ccf2006798834fe78 SHA-256: b502a37a438da1fd621c0b90702555b2302c7ec51deb88145cf8e6ae57a40248
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to a malicious redirector, specifically advertising a 'game hack' for Roblox. The document body and embedded URLs reinforce this lure, directing users to a URL associated with known malicious infrastructure. This suggests a phishing or scam attempt designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.tw/app/431946152/how-to-change-your-health-on-roblox-with-cheat-engine-game-hack In PDF document text
    • https://www.sharmagoa.com/uploaded_files/userfiles/files/master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://www.sharmagoa.com/uploaded_files/userfiles/files/coin-master-hack-2021-app_GM406889139.pdfIn PDF document text
    • https://www.sharmagoa.com/uploaded_files/userfiles/files/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://www.sharmagoa.com/uploaded_files/userfiles/files/tiktok-free-package-dialog_GM835599320.pdfIn PDF document text
    • https://www.sharmagoa.com/uploaded_files/userfiles/files/free-roblox-clothes-girl_GM431946152.pdfIn PDF document text
    • https://www.sharmagoa.com/uploaded_files/userfiles/files/how-to-download-minecraft-for-free-on-windows_GM479516143.pdfIn PDF document text
    • https://www.sharmagoa.com/uploaded_files/userfiles/files/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • https://www.sharmagoa.com/uploaded_files/userfiles/files/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • https://www.sharmagoa.com/uploaded_files/userfiles/files/hack-spin-coin-master_GM406889139.pdfIn PDF document text
    • https://www.sharmagoa.com/uploaded_files/userfiles/files/minecraft-realms-free_GM479516143.pdfIn PDF document text
    • https://www.sharmagoa.com/uploaded_files/userfiles/files/coin-master-free-spins-ios_GM406889139.pdfIn PDF document text
    • https://www.sharmagoa.com/uploaded_files/userfiles/files/haktuts-coin-master-free-spin-link-today_GM406889139.pdfIn PDF document text
    • https://www.sharmagoa.com/uploaded_files/userfiles/files/free-tiktok-email-and-password_GM835599320.pdfIn PDF document text
    • https://www.sharmagoa.com/uploaded_files/userfiles/files/free-spins-coin-master-october-13-2021_GM406889139.pdfIn PDF document text
    • https://www.sharmagoa.com/uploaded_files/userfiles/files/mcpe-com_GM479516143.pdfIn PDF document text
    • https://www.sharmagoa.com/uploaded_files/userfiles/files/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.sharmagoa.com/uploaded_files/userfiles/files/is-there-a-free-version-of-minecraft_GM479516143.pdfIn PDF document text
    • https://www.sharmagoa.com/uploaded_files/userfiles/files/free-minecraft-premium-account_GM479516143.pdfIn PDF document text
    • https://www.sharmagoa.com/uploaded_files/userfiles/files/coin-master-hack-injection_GM406889139.pdfIn PDF document text
    • https://www.sharmagoa.com/uploaded_files/userfiles/files/how-to-get-coin-master-card-free_GM406889139.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_004_off000053a9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53A9 27668 bytes
SHA-256: c4c24f2c079e1e40426be2bae2487ce214d246284dbfcd0ff9999d7176057e8d
font_01_sfnt_off0000929c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x929C 19352 bytes
SHA-256: 5e3038b1cded018f26079c95e127e84f6e876204649a5ee560c4a23548d021e5

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