Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f6644a874e8ce18…

MALICIOUS

PDF

43.7 KB Created: 2021-05-16 22:01:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 42b7337f21f564c775290b7facf85e08 SHA-1: 6ada005c315707672b27284855c8fc73a093d69f SHA-256: 8f6644a874e8ce185c3f7975943f7d5c23d510a91736e84c33d7ca0bc11bf689
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links and a link farm, all pointing to websites offering game hacks and free spins, indicative of a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs suggests it's designed to redirect users to potentially harmful content. No scripts were extracted, but the overall structure and content point to a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/406889139/coin-master-free-spins-hack-no-human-verification-game-hack
    • http://kundentest.de/images/freespinandcoinblogspot-com-2021-11-coinmasterfreespins_GM406889139.pdf
    • http://kundentest.de/images/free-robux-without-human-verification-real_GM431946152.pdf
    • http://kundentest.de/images/free-coin-master-spins-link-download_GM406889139.pdf
    • http://kundentest.de/images/free-spins-coin-master-april-2021_GM406889139.pdf
    • http://kundentest.de/images/free-robux-giveaway_GM431946152.pdf
    • http://kundentest.de/images/free-spins-on-coin-master-2021_GM406889139.pdf
    • http://kundentest.de/images/no-human-verification-coin-master-hack_GM406889139.pdf
    • http://kundentest.de/images/how-to-download-wurst_GM479516143.pdf
    • http://kundentest.de/images/free-robux-real_GM431946152.pdf
    • http://kundentest.de/images/how-to-get-minecraft-bedrock-for-free_GM479516143.pdf
    • http://kundentest.de/images/minecraft-115-2-hacks_GM479516143.pdf
    • http://kundentest.de/images/roblox-com-free-robux_GM431946152.pdf
    • http://kundentest.de/images/links-to-get-free-spins-on-coin-master_GM406889139.pdf
    • http://kundentest.de/images/coin-master-free-spins-hack-2021_GM406889139.pdf
    • http://kundentest.de/images/free-coins-coin-master-link-2021_GM406889139.pdf
    • http://kundentest.de/images/get-free-spins-in-coin-master_GM406889139.pdf
    • http://kundentest.de/images/how-to-hack-someones-roblox-account-2021_GM431946152.pdf
    • http://kundentest.de/images/coin-master-instagram-free-spins_GM406889139.pdf
    • http://kundentest.de/images/free-robux-generator-no-verification_GM431946152.pdf
    • http://kundentest.de/images/robux-get-com_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004981.bin
67a3e1f3caf4d6e8414b7d5f178cf8ec244bd226f4ff6eab256d221fdd0d3d8f
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4981 28252 bytes
font_01_sfnt_off000087b9.bin
081cdec62be70198d45fc172e7048a56943a6446be15e687158c1977e2c6d250
pdf-font-stream PDF embedded font (sfnt) at offset 0x87B9 18588 bytes