Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a16e4be2d8beeda…

MALICIOUS

PDF

52.1 KB Created: 2021-05-13 11:08:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 243dcbe9db3ba21adaa882d90b5e627d SHA-1: 5217e685fcf4b52f2a4bd08829448573bfc774bd SHA-256: 8a16e4be2d8beeda534678011f76a24a2cc20cebe6b2500ed59be5a4b8535a34
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure related to hacking Roblox accounts, directing users to a malicious URL. The ML classifier also flagged this PDF as malicious. The presence of embedded URLs and the document's theme strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8646

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 https://netcdn.xyz/app/431946152/how-to-hack-someone In PDF document text
    • http://xn--regg-blumen-thb.ch/images/free-printable-roblox-coloring-pages_GM431946152.pdfIn PDF document text
    • http://xn--regg-blumen-thb.ch/images/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://xn--regg-blumen-thb.ch/images/minecraft-pe-016-0-apk-download-free_GM479516143.pdfIn PDF document text
    • http://xn--regg-blumen-thb.ch/images/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://xn--regg-blumen-thb.ch/images/mcpe_GM479516143.pdfIn PDF document text
    • http://xn--regg-blumen-thb.ch/images/roblox-free-clothes-generator_GM431946152.pdfIn PDF document text
    • http://xn--regg-blumen-thb.ch/images/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://xn--regg-blumen-thb.ch/images/robux-today_GM431946152.pdfIn PDF document text
    • http://xn--regg-blumen-thb.ch/images/download-hacked-games-com-coin-master_GM406889139.pdfIn PDF document text
    • http://xn--regg-blumen-thb.ch/images/free-robux-exe_GM431946152.pdfIn PDF document text
    • http://xn--regg-blumen-thb.ch/images/download-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://xn--regg-blumen-thb.ch/images/how-to-become-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • http://xn--regg-blumen-thb.ch/images/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://xn--regg-blumen-thb.ch/images/coin-master-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://xn--regg-blumen-thb.ch/images/how-to-play-minecraft-online-for-free_GM479516143.pdfIn PDF document text
    • http://xn--regg-blumen-thb.ch/images/minecraft-free-download-android-apk-014-0_GM479516143.pdfIn PDF document text
    • http://xn--regg-blumen-thb.ch/images/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://xn--regg-blumen-thb.ch/images/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://xn--regg-blumen-thb.ch/images/free-spin-gratis-coin-master_GM406889139.pdfIn PDF document text
    • http://xn--regg-blumen-thb.ch/images/coin-master-free-download-for-pc_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c33.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C33 29232 bytes
SHA-256: 35bc46ae978a30db9e2de2258139150a23096040e17d0fa002e848b9608b3b4a
font_01_sfnt_off00008cfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CFE 2896 bytes
SHA-256: 0f10adbf105d053971010bc1f17c4dd55814d599674c84f75a6eb4cb46a9c89b
font_02_sfnt_off000096f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96F0 6700 bytes
SHA-256: ae114634718854704d615808d33fb1b747d90eb28e420080bd5adbdfe7fb6a27
font_03_sfnt_off0000a72e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA72E 18912 bytes
SHA-256: 995056b981027bfba3f97be2499ebace8b386febdb07856c531761fbe005e83e

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