Malicious PDF — malware analysis report

Static analysis result for SHA-256 d39cafa7d2ef5eff…

MALICIOUS

PDF

33.8 KB Created: 2021-07-06 13:23:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ecc119ab5d798c58c4743563ec49beaa SHA-1: 725b481c548798bc2313ce8c3746992323991140 SHA-256: d39cafa7d2ef5eff0865dbdf1fd929efc012fc1c089d21b272ffff9769b08bb5
102 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are structured as SEO-optimized PDF files related to game hacks and free currency. The document body explicitly mentions 'Free Robux Codes No Verification 2021' and includes a direct URL, indicating a lure for users seeking such items. The ML classifier strongly flagged this PDF as malicious, suggesting it's designed to redirect users to potentially harmful content or exploit kits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/free-robux-codes-no-verification-2021-game-hack
    • http://foo.com.tw/files/is-there-a-way-to-get-free-bobux-on-roblox_GM431946152.pdf
    • http://foo.com.tw/files/how-do-you-hack-roblox_GM431946152.pdf
    • http://foo.com.tw/files/coin-master-hack-ios-cydia_GM406889139.pdf
    • http://foo.com.tw/files/coin-master-hack-with-facebook-login_GM406889139.pdf
    • http://foo.com.tw/files/how-to-get-free-spins-for-coin-master_GM406889139.pdf
    • http://foo.com.tw/files/free-coin-master-coins_GM406889139.pdf
    • http://foo.com.tw/files/free-followers-on-roblox-no-verification_GM431946152.pdf
    • http://foo.com.tw/files/promo-codes-for-free-robux_GM431946152.pdf
    • http://foo.com.tw/files/coin-master-free-coins-today_GM406889139.pdf
    • http://foo.com.tw/files/coin-master-free-coins-and-spins_GM406889139.pdf
    • http://foo.com.tw/files/rbx-gg-free-robux_GM431946152.pdf
    • http://foo.com.tw/files/coin-master-free-spins-and-coins-2021_GM406889139.pdf
    • http://foo.com.tw/files/coin-master-daily_GM406889139.pdf
    • http://foo.com.tw/files/minecraft-free-download-android_GM479516143.pdf
    • http://foo.com.tw/files/free-robux-websites-2021_GM431946152.pdf
    • http://foo.com.tw/files/get-free-robux-2021_GM431946152.pdf
    • http://foo.com.tw/files/como-hacer-un-hack-en-roblox_GM431946152.pdf
    • http://foo.com.tw/files/how-to-get-free-coins-in-roblox-bandit-siimuator_GM431946152.pdf
    • http://foo.com.tw/files/free-roblox-gift-card_GM431946152.pdf
    • http://foo.com.tw/files/free-coin-master-spins-and-coins_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002c67.bin
2184c212e2fb28f98872ba99d164af01d38bd36670c7a6c6f7249a9e3bfb3076		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C67 22032 bytes
font_01_sfnt_off00005ccf.bin
c9b5e446bd4f49308c598e64be383601662d64f1913011d813836102a9eea03a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CCF 19648 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.