Malicious PDF — malware analysis report

Static analysis result for SHA-256 373d051dd02c6649…

MALICIOUS

PDF

44.5 KB Created: 2021-06-02 12:46:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 93a6e674e5ff2c82002682f4cd59e7a3 SHA-1: e7e5a44897bbde96ec13e24e4c8cf27ead39e0c4 SHA-256: 373d051dd02c6649b5c0fde7c85ccef268197e65d1ab146a476608ff426092d6
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are structured as SEO-optimized links to pages promising game cheats and free currency. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm suggests a deceptive intent to drive traffic to potentially harmful sites. While no scripts were explicitly extracted, the PDF structure and embedded links indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/431946152/free-unlimited-robux-generator-no-human-verification-game-hack
    • https://elite-house.su/images/safe-hack-for-coin-master-android_GM406889139.pdf
    • https://elite-house.su/images/coin-master-daily-free-spins-and-coins-link_GM406889139.pdf
    • https://elite-house.su/images/how-to-get-free-robux-fast_GM431946152.pdf
    • https://elite-house.su/images/coin-master-free-spins-and-coins-link-blogspot_GM406889139.pdf
    • https://elite-house.su/images/coin-master-free-spins-daily-fb-champion_GM406889139.pdf
    • https://elite-house.su/images/free-robux-com-roblox_GM431946152.pdf
    • https://elite-house.su/images/free-roblox-pin-codes_GM431946152.pdf
    • https://elite-house.su/images/coin-master-attack-hack-apk_GM406889139.pdf
    • https://elite-house.su/images/tiktok-views-free_GM835599320.pdf
    • https://elite-house.su/images/free-spin-gratis-coin-master_GM406889139.pdf
    • https://elite-house.su/images/minecraft-mobile-free_GM479516143.pdf
    • https://elite-house.su/images/get-free-robux-today_GM431946152.pdf
    • https://elite-house.su/images/coin-master-free-spins-1-coin-master_GM406889139.pdf
    • https://elite-house.su/images/why-is-tiktok-free_GM835599320.pdf
    • https://elite-house.su/images/how-to-get-free-robux-without-verification-2021_GM431946152.pdf
    • https://elite-house.su/images/robux-no-verification_GM431946152.pdf
    • https://elite-house.su/images/get-coin-master-free-spin_GM406889139.pdf
    • https://elite-house.su/images/free-coins-on-coin-master_GM406889139.pdf
    • https://elite-house.su/images/how-long-is-the-minecraft-free-trial_GM479516143.pdf
    • https://elite-house.su/images/free-roblox-gfx_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004ce5.bin
0f76e75cb8637f9e9a453a6de4bfa5683015abcbe5052bc8f56c62025e726eba
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CE5 25504 bytes
font_01_sfnt_off0000885e.bin
9f36b342d0f2b415820634fef2630d603a5ee9ee99dbbc2d65ade1c5094483f4
pdf-font-stream PDF embedded font (sfnt) at offset 0x885E 19292 bytes