Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1eaf2aeccbeeb0f…

MALICIOUS

PDF

32.8 KB Created: 2021-07-22 12:54:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 41240d494738af581328a9ce189f11bd SHA-1: df366ac5f419804cf7a0a7f6486f684b22b2d613 SHA-256: a1eaf2aeccbeeb0f11de43cd9d17680a512fe792fc2b73a2878a921e3ad4690d
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links and a call-to-action button, directing users to a website that promises free Robux. This is a common lure for phishing or malware distribution. The ML classifier strongly flagged this PDF as malicious, and it links to known malicious redirector infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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.tw/app/431946152/huskybucks.com-free-robux-game-hack In PDF document text
    • http://kfz-werkstatt-etp.de/images/how-to-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://kfz-werkstatt-etp.de/images/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://kfz-werkstatt-etp.de/images/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://kfz-werkstatt-etp.de/images/minecraft-gun-games-free_GM479516143.pdfIn PDF document text
    • http://kfz-werkstatt-etp.de/images/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://kfz-werkstatt-etp.de/images/free-tiktok-likes_GM835599320.pdfIn PDF document text
    • http://kfz-werkstatt-etp.de/images/roblox-hack-mo_GM431946152.pdfIn PDF document text
    • http://kfz-werkstatt-etp.de/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://kfz-werkstatt-etp.de/images/free-robux-exe_GM431946152.pdfIn PDF document text
    • http://kfz-werkstatt-etp.de/images/free-robux-generator-no-verification_GM431946152.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_off00002c2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C2F 21980 bytes
SHA-256: adff6183d3d96398cc0ec5d6cceb92630a2cedcf1aef5f63679cef9c9141abad
font_01_sfnt_off00005c5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C5F 18876 bytes
SHA-256: df352b193608498139f65290c43f31aa68bac06a7a86618afde903f71d2ebe9c

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