Malicious PDF — malware analysis report

Static analysis result for SHA-256 260f06a3c8dba349…

MALICIOUS

PDF

44.6 KB Created: 2021-05-17 13:44:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a196c2fd57669253c76c1726f2d305e4 SHA-1: bba529fadc1a238981410dc0b038efba295f8799 SHA-256: 260f06a3c8dba3495f465bb1cfb519bf3de06e968ba26b4659d53b8a23fe36d2
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a link farm heuristic, strongly suggesting a phishing or malware distribution attempt. The document body, though partially corrupted, contains references to 'Coin Master Free Coins And Spins' and game hacks, indicating a lure for potentially valuable in-game items. The presence of external URIs and a high ML classifier score further support its malicious nature, likely serving as a gateway to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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-coins-and-spins-game-hack
    • http://ikig.ru/images/coin-master-online-hack_GM406889139.pdf
    • http://ikig.ru/images/can-u-get-free-robux_GM431946152.pdf
    • http://ikig.ru/images/coin-master-free-spins-deutsch-download-2021-link_GM406889139.pdf
    • http://ikig.ru/images/moon-static-coin-master-generator-hacks-free_GM406889139.pdf
    • http://ikig.ru/images/minecraft-windows-10-hacks_GM479516143.pdf
    • http://ikig.ru/images/minecraft-nintendo-switch-digital-code-free_GM479516143.pdf
    • http://ikig.ru/images/coin-master-free-spins-link-2021-hack_GM406889139.pdf
    • http://ikig.ru/images/get-free-spins-on-coin-master_GM406889139.pdf
    • http://ikig.ru/images/no-verification-coin-master-hack_GM406889139.pdf
    • http://ikig.ru/images/free-robux-generator-codes_GM431946152.pdf
    • http://ikig.ru/images/free-robux-today_GM431946152.pdf
    • http://ikig.ru/images/coin-master-hack-tool-2021_GM406889139.pdf
    • http://ikig.ru/images/how-to-get-minecraft-for-free-2021_GM479516143.pdf
    • http://ikig.ru/images/coin-master-spins_GM406889139.pdf
    • http://ikig.ru/images/coin-master-free-link-app_GM406889139.pdf
    • http://ikig.ru/images/earn-free-robux-for-roblox_GM431946152.pdf
    • http://ikig.ru/images/coin-master-free-spin-download_GM406889139.pdf
    • http://ikig.ru/images/how-to-hack-coin-master-2021_GM406889139.pdf
    • http://ikig.ru/images/hack-coin-master-spin-apk_GM406889139.pdf
    • http://ikig.ru/images/free-spin-link-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004754.bin
6d918d105e3bd3dd33ef39a29da6856ac8cacb3c2eaaeaa7c8d0024d9ea634d4
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4754 24260 bytes
font_01_sfnt_off00007ec3.bin
d2d857e2ddc1082c7667b23f2135a5c0ba26a2ff8b42c86c89c8e0b09aece855
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EC3 2868 bytes
font_02_sfnt_off000088ad.bin
31e8e2a68dc72538b836b87b6621d4ff8da9b7d72f5c6b7559bddddd417fc0e6
pdf-font-stream PDF embedded font (sfnt) at offset 0x88AD 19212 bytes