Malicious PDF — malware analysis report

Static analysis result for SHA-256 a534a4c83d641999…

MALICIOUS

PDF

33.6 KB Created: 2021-06-17 22:38:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 49758ebcdf3e2151f31a8effeed7d70e SHA-1: 2c27b966da22bb3103385b50a53cfcd8198a72f1 SHA-256: a534a4c83d641999c6cb90192cde4efc371dddb116e18333f6ba68c5c7b41916
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links and text that explicitly mention 'hack' and 'free' for popular games like Roblox and Coin Master. One of the embedded URLs, http://netcdn.co/app/431946152/how-to-hack-into-anyone's-roblox-account-2021-game-hack, is flagged as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document's content and the flagged URL suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 3

  • 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.co/app/431946152/how-to-hack-into-anyone In PDF document text
    • http://torkelson.se/images/coin-master-time-hack-ios_GM406889139.pdfIn PDF document text
    • http://torkelson.se/images/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • http://torkelson.se/images/como-tener-robux-gratis-facil-y-rapido-sin-hack_GM431946152.pdfIn PDF document text
    • http://torkelson.se/images/minecraft-free-app_GM479516143.pdfIn PDF document text
    • http://torkelson.se/images/is-roblox-hacked_GM431946152.pdfIn PDF document text
    • http://torkelson.se/images/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • http://torkelson.se/images/coin-master-hacks-2021_GM406889139.pdfIn PDF document text
    • http://torkelson.se/images/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • http://torkelson.se/images/get-free-lives-on-coin-master_GM406889139.pdfIn PDF document text
    • http://torkelson.se/images/tiktok-free-save_GM835599320.pdfIn PDF document text
    • http://torkelson.se/images/minecraft-windows-10-edition-unlock-full-game-free_GM479516143.pdfIn PDF document text
    • http://torkelson.se/images/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://torkelson.se/images/cheat-roblox-mad-city-money_GM431946152.pdfIn PDF document text
    • http://torkelson.se/images/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://torkelson.se/images/free-robux-offers_GM431946152.pdfIn PDF document text
    • http://torkelson.se/images/picture-roblox_GM431946152.pdfIn PDF document text
    • http://torkelson.se/images/roblox-hack-client-april-2021_GM431946152.pdfIn PDF document text
    • http://torkelson.se/images/free-robux-code-hack_GM431946152.pdfIn PDF document text
    • http://torkelson.se/images/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • http://torkelson.se/images/coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002bd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BD4 21960 bytes
SHA-256: 7431e17b762cf8ade76bb4ce436c94a1a8be144e8e027821428d7aacf6420a5d
font_01_sfnt_off00005c64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C64 19524 bytes
SHA-256: 1c36108cf9dde7c1be8b36416f01427c8b6089bc43c015ead9b6f9b59923a1d9

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