Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7ca8cb7a7afad13…

MALICIOUS

PDF

37.7 KB Created: 2021-06-20 09:46:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 4d7a70941abb5a8173fde97b1e31c4d7 SHA-1: 93e48c89c24038ab6b46b034aac92f3237014d23 SHA-256: f7ca8cb7a7afad13a33469eac38a865007ca9a7cd4505105c7a8292f06426adb
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 hosted on domains related to game hacks and free virtual currency. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a tactic to distribute malicious content or phish for credentials. The ML classifier also strongly flagged this PDF as malicious. The presence of embedded URLs and the document body's lure of 'Free Robux' point towards a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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/get-free-robux-by-doing-surveys-game-hack
    • http://muslib.unmus.ac.id/repository/hack-coin-master-download_GM406889139.pdf
    • http://muslib.unmus.ac.id/repository/coin-master-hack-8-ball-pool_GM406889139.pdf
    • http://muslib.unmus.ac.id/repository/coin-master-hack-tool-apk-download_GM406889139.pdf
    • http://muslib.unmus.ac.id/repository/roblox-hacks-2021_GM431946152.pdf
    • http://muslib.unmus.ac.id/repository/coin-master-hack-android_GM406889139.pdf
    • http://muslib.unmus.ac.id//repository/how-to-block-someone-on-coin-master_GM406889139.pdf
    • http://muslib.unmus.ac.id/repository/robux-2021_GM431946152.pdf
    • http://muslib.unmus.ac.id/repository/codes-how-to-get-free-robux_GM431946152.pdf
    • http://muslib.unmus.ac.id//repository/coin-master-fun-free-spins_GM406889139.pdf
    • http://muslib.unmus.ac.id/repository/coin-master-hack-unlimited-spins-apk-download_GM406889139.pdf
    • http://muslib.unmus.ac.id/repository/games-that-can-be-hacked_GM431946152.pdf
    • http://muslib.unmus.ac.id//repository/coin-master-free-spins-for-today_GM406889139.pdf
    • http://muslib.unmus.ac.id/repository/coin-master-spins-hack-2021_GM406889139.pdf
    • http://muslib.unmus.ac.id//repository/free-robux-with-no-verification-2021_GM431946152.pdf
    • http://muslib.unmus.ac.id//repository/free-robux-by-watching-ads_GM431946152.pdf
    • http://muslib.unmus.ac.id//repository/coin-master-game-hack-app_GM406889139.pdf
    • http://muslib.unmus.ac.id/repository/daily-free-spin-link-in-coin-master_GM406889139.pdf
    • http://muslib.unmus.ac.id/repository/xray-hack_GM479516143.pdf
    • http://muslib.unmus.ac.id//repository/how-to-hack-someones-roblox-account-2021_GM431946152.pdf
    • http://muslib.unmus.ac.id/repository/minecraft-windows-10-free-with-java_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000039f4.bin
51ee03eb792c578e73deb7a3eac2d9a771f3b566879233af754197fdec8fb435		 pdf-font-stream PDF embedded font (sfnt) at offset 0x39F4 22812 bytes
font_01_sfnt_off00006d3a.bin
7ec21ae996cd2ff6dc71419414d0194d1891c33d576b6fbfe5ffafa501dfdd1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D3A 19400 bytes

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