Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fb31e978c30ab8e…

MALICIOUS

PDF

42.9 KB Created: 2021-06-14 01:59:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 699ce7b31c9255ea8ad9f10ad8e096bd SHA-1: d777169126ac1b4138cad6031fb4dcd671e87c9e SHA-256: 0fb31e978c30ab8ea75f9032bae365885edca9369750f3cd28e063bc46b7c8bf
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links and a primary URL, all pointing to sites offering game hacks and free in-game currency, indicating a phishing or scam attempt. The PDF_SEO_LINK_FARM heuristic suggests a large number of similar links were generated, likely to increase visibility for these lures. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.co/app/431946152/roblox-free-credit-card-game-hack
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/coin-master-free-spins-hack_GM406889139.pdf
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/free-daily-spins-coin-master-2021_GM406889139.pdf
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/free-robux-no-verify-2021_GM431946152.pdf
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/how-hack-roblox-accounts_GM431946152.pdf
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/how-do-you-get-free-robux_GM431946152.pdf
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/can-i-download-minecraft-for-free_GM479516143.pdf
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/how-can-u-get-free-robux_GM431946152.pdf
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/roblox-hacked-version-download_GM431946152.pdf
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/claimrbx-free-robux_GM431946152.pdf
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/free-tiktok-fans_GM835599320.pdf
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/can-u-get-free-robux_GM431946152.pdf
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/free-robux-no-gift-card_GM431946152.pdf
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/free-minecraft-skin-maker_GM479516143.pdf
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/minecraft-java-for-free_GM479516143.pdf
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/free-robux-without-doing-anything_GM431946152.pdf
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/coin-master-unlimited-spins-apk-free-download_GM406889139.pdf
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/free-spins-coin-master-ios-2021_GM406889139.pdf
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/how-do-u-hack-roblox_GM431946152.pdf
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/coin-master-free-spins-app_GM406889139.pdf
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/coin-master-spin-hack-no-human-verification_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b0e.bin
6200f0c163b15da0f44f5a6619951d04e7837cba0325fcca128eb39dee19580a		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B0E 24908 bytes
font_01_sfnt_off00008498.bin
e96e6696370c27848384339a26b4c8f7dff65e724bafd19fe522974fcda75129		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8498 18572 bytes

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