Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b2530bcae1793a9…

MALICIOUS

PDF

44.0 KB Created: 2021-05-13 06:31:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: de3dd0668eea599255829dc3b82b01ed SHA-1: 55cacd9c3fd56d3df29fd4445b340c1666ccca24 SHA-256: 1b2530bcae1793a9f36aa11ccff86dd8060666fd18c99f9d752240878d3257d0
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which point to game-related hacks and cheats. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm suggests an attempt to drive traffic to potentially harmful sites. While no scripts were explicitly extracted, the PDF structure and embedded links indicate a malicious intent to redirect users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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-game-free-spin-game-hack
    • http://dieter-sauter.com/images/roblox-adopt-me-hack_GM431946152.pdf
    • http://dieter-sauter.com/images/fb-coin-master-hack_GM406889139.pdf
    • http://dieter-sauter.com/images/how-to-hack-coin-master-apkmody_GM406889139.pdf
    • http://dieter-sauter.com/images/free-spins-coin-master-unlimited_GM406889139.pdf
    • http://dieter-sauter.com/images/coin-master-free-spins-today-daily-links_GM406889139.pdf
    • http://dieter-sauter.com/images/roblox-fun-com-free-robux_GM431946152.pdf
    • http://dieter-sauter.com/images/free-spins-coin-master-app-iphone_GM406889139.pdf
    • http://dieter-sauter.com/images/free-robux-codes-no-verification_GM431946152.pdf
    • http://dieter-sauter.com/images/play-full-version-of-minecraft-for-free-no-download_GM479516143.pdf
    • http://dieter-sauter.com/images/easy-ways-to-get-free-robux_GM431946152.pdf
    • http://dieter-sauter.com/images/free-robux-on-ipad_GM431946152.pdf
    • http://dieter-sauter.com/images/how-to-get-java-minecraft-for-free_GM479516143.pdf
    • http://dieter-sauter.com/images/ww-robux_GM431946152.pdf
    • http://dieter-sauter.com/images/cm-free-spins-and-coins_GM406889139.pdf
    • http://dieter-sauter.com/images/free-robux-without-downloading-anything_GM431946152.pdf
    • http://dieter-sauter.com/images/coin-master-hack-app-2021_GM406889139.pdf
    • http://dieter-sauter.com/images/minecraft-games-online-free-no-download_GM479516143.pdf
    • http://dieter-sauter.com/images/get-free-spins-on-coin-master_GM406889139.pdf
    • http://dieter-sauter.com/images/roblox-hack-game_GM431946152.pdf
    • http://dieter-sauter.com/images/e-free-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004817.bin
2c74e3be1f20e191384d575026350f214db0d6c1a91cc0c223601b4a9c21caa1
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4817 25412 bytes
font_01_sfnt_off00008054.bin
3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
pdf-font-stream PDF embedded font (sfnt) at offset 0x8054 2840 bytes
font_02_sfnt_off00008a05.bin
504bf69ab615d46cf168ba32f934bf745dfb0b3d16564297e15ae7f7ea829546
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A05 18148 bytes