Malicious PDF — malware analysis report

Static analysis result for SHA-256 28319f63106e107f…

MALICIOUS

PDF

47.6 KB Created: 2021-06-02 14:08:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-14
MD5: ffd8be4d743d0fa88502e8de0e9a373a SHA-1: 538bac8ea95b07a60eb0db7da539ef58460d0185 SHA-256: 28319f63106e107f898a2f1cf7dffcd1287f73f3ab8a210f378a2d2813b73df5
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link pointing to a website related to game hacks. The ML classifier also flagged the document with high confidence. The embedded URLs and the document body suggest a lure to a site offering game cheats, likely for phishing or malware distribution. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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/www.robux-hacks.com-game-hack In PDF document text
    • http://unsere-beagles.de/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://unsere-beagles.de/images/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://unsere-beagles.de/images/how-to-get-free-hair-in-roblox_GM431946152.pdfIn PDF document text
    • http://unsere-beagles.de/images/10-robux_GM431946152.pdfIn PDF document text
    • http://unsere-beagles.de/images/coin-master-free-spins-link-fb_GM406889139.pdfIn PDF document text
    • http://unsere-beagles.de/images/minecraft-pe-free-apk_GM479516143.pdfIn PDF document text
    • http://unsere-beagles.de/images/online-hacking-tricks-coin-master_GM406889139.pdfIn PDF document text
    • http://unsere-beagles.de/images/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://unsere-beagles.de/images/fb-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://unsere-beagles.de/images/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • http://unsere-beagles.de/images/minecraft-win-10-free_GM479516143.pdfIn PDF document text
    • http://unsere-beagles.de/images/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://unsere-beagles.de/images/free-robux-just-enter-username-and-password_GM431946152.pdfIn PDF document text
    • http://unsere-beagles.de/images/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://unsere-beagles.de/images/coin-master-free-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://unsere-beagles.de/images/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://unsere-beagles.de/images/wurst-client-download_GM479516143.pdfIn PDF document text
    • http://unsere-beagles.de/images/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://unsere-beagles.de/images/easy-robux-hack_GM431946152.pdfIn PDF document text
    • http://unsere-beagles.de/images/minecraft-pe-free-download-ios_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004e12.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E12 26916 bytes
SHA-256: f7172db8455b4b8d32dd07bae0578315e818a9f55064f6277a84b895e78e6e4b
font_01_sfnt_off00008b18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B18 2824 bytes
SHA-256: 94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4
font_02_sfnt_off000094c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94C7 19136 bytes
SHA-256: a5a1d70b4dbec9fddd6c2e95e83de940c50209c7213b2e340a51e9bc4c20070c