Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd5180541a928f52…

MALICIOUS

PDF

51.8 KB Created: 2021-06-10 17:45:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 21c31ae4027defb8848234f3918d0b55 SHA-1: 5a1410c6a87100345f0a4a2017de898b798ef10c SHA-256: fd5180541a928f5271d5dfd4482e801570f9704dd32d19c441e0f4a5b006adb5
102 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which are SEO-optimized and point to game-related cheat pages. The ML classifier strongly indicated maliciousness, and the presence of embedded links suggests a phishing or malware distribution attempt. The document's content and structure are consistent with a lure to drive users to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9657

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.tw/app/431946152/how-to-cheat-in-roblox-2021-game-hack
    • https://www.knjizara-harfa.rs/files/coin-master-free-500-spins-link_GM406889139.pdf
    • https://www.knjizara-harfa.rs/files/coin-master-free-spin-link-app_GM406889139.pdf
    • https://www.knjizara-harfa.rs/files/how-to-get-robux-for-free-2021_GM431946152.pdf
    • https://www.knjizara-harfa.rs/files/coin-master-spin-link-today-free_GM406889139.pdf
    • https://www.knjizara-harfa.rs/files/how-do-you-earn-free-coins-for-coin-master_GM406889139.pdf
    • https://www.knjizara-harfa.rs/files/free-robux-meme_GM431946152.pdf
    • https://www.knjizara-harfa.rs/files/coin-master-daily-spins-and-coins_GM406889139.pdf
    • https://www.knjizara-harfa.rs/files/25-free-spins-coin-master_GM406889139.pdf
    • https://www.knjizara-harfa.rs/files/toolbox-mod_GM479516143.pdf
    • https://www.knjizara-harfa.rs/files/coin-master-free-spins-link-download_GM406889139.pdf
    • https://www.knjizara-harfa.rs/files/how-to-download-minecraft-for-free_GM479516143.pdf
    • https://www.knjizara-harfa.rs/files/coin-master-free-spins-hack_GM406889139.pdf
    • https://www.knjizara-harfa.rs/files/hack-to-get-free-spins-on-coin-master_GM406889139.pdf
    • https://www.knjizara-harfa.rs/files/coin-master-hack-apk-facebook-login_GM406889139.pdf
    • https://www.knjizara-harfa.rs/files/100-free-spins-on-coin-master_GM406889139.pdf
    • https://www.knjizara-harfa.rs/files/free-coin-and-spin-in-coin-master_GM406889139.pdf
    • https://www.knjizara-harfa.rs/files/free-robux-gift-card-codes_GM431946152.pdf
    • https://www.knjizara-harfa.rs/files/free-roblox-groups-with-funds_GM431946152.pdf
    • https://www.knjizara-harfa.rs/files/robux-sign_GM431946152.pdf
    • https://www.knjizara-harfa.rs/files/how-to-get-free-roblox-premium_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000527f.bin
194318d5a1a1f9924d7f2cbf1477011d4daea0348563ca2a3af7be9bdd61b845		 pdf-font-stream PDF embedded font (sfnt) at offset 0x527F 25616 bytes
font_01_sfnt_off00008c55.bin
f6b9a386ee4e0aff622a98b2230905da71eab0ca98398cb52018fda3528d3e2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C55 3964 bytes
font_02_sfnt_off000099b3.bin
e59bc53cd4c0ee65dc1533becad2866f345dcb060e6c68bb8187d21cb9f973ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99B3 3396 bytes
font_03_sfnt_off0000a5a6.bin
4570f9290f6e369a495c066d75d7a2add5183e2298abfab9e861aad6e431b3fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5A6 18848 bytes

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