Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd11c89146038101…

MALICIOUS

PDF

46.6 KB Created: 2021-05-17 06:50:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 2338e67751f1b17c2bcb73d29925c10f SHA-1: af114bdb18cc423743ff956d26ce1c96f8f40abe SHA-256: bd11c89146038101bbd1c82bb4f5b64b8ebe04ca7edf80ff558de737dd8ad24a
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains a fake CAPTCHA lure, designed to trick users into interacting with malicious links. The document embeds numerous external URLs, including a link farm, suggesting an attempt to drive traffic to scam or malware distribution sites. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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-robux-kid-friendly-game-hack
    • http://moringaforlove.com/images/how-to-make-roblox-clothes-for-free_GM431946152.pdf
    • http://moringaforlove.com/images/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdf
    • http://moringaforlove.com/images/coin-master-free-spins-twitter_GM406889139.pdf
    • http://moringaforlove.com/images/cheat-codes-for-coin-master_GM406889139.pdf
    • http://moringaforlove.com/images/get-coin-master-cards-free_GM406889139.pdf
    • http://moringaforlove.com/images/minecraft-for-ps3-free_GM479516143.pdf
    • http://moringaforlove.com/images/roblox-free-roblox_GM431946152.pdf
    • http://moringaforlove.com/images/coin-master-hack-ios-reddit_GM406889139.pdf
    • http://moringaforlove.com/images/roblox-hack-download_GM431946152.pdf
    • http://moringaforlove.com/images/how-to-get-free-chest-in-coin-master_GM406889139.pdf
    • http://moringaforlove.com/images/get-free-robux-now_GM431946152.pdf
    • http://moringaforlove.com/images/how-to-get-free-spins-in-coin-master_GM406889139.pdf
    • http://moringaforlove.com/images/what-is-exploiting-in-roblox_GM431946152.pdf
    • http://moringaforlove.com/images/coin-master-free-spins-and-coins-generator_GM406889139.pdf
    • http://moringaforlove.com/images/coin-master-hack-spin-generator_GM406889139.pdf
    • http://moringaforlove.com/images/hey-google-how-do-you-get-free-robux_GM431946152.pdf
    • http://moringaforlove.com/images/coin-master-official-website_GM406889139.pdf
    • http://moringaforlove.com/images/coin-master-daily-bonus_GM406889139.pdf
    • http://moringaforlove.com/images/20-free-spin-link-coin-master_GM406889139.pdf
    • http://moringaforlove.com/images/how-to-make-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004cda.bin
57ff851d546139e81e5535b2e1979a5603a4839fdc97ed78b4ebe2a7ba400c54		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CDA 25812 bytes
font_01_sfnt_off0000891f.bin
94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x891F 2824 bytes
font_02_sfnt_off000092cd.bin
454f7722b5e362ebb3dfaacf6303323d9fe80b0a3b091af17d82283aff73172d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92CD 18560 bytes

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