Malicious PDF — malware analysis report

Static analysis result for SHA-256 348f93977077fbdd…

MALICIOUS

PDF

44.6 KB Created: 2021-05-20 05:19:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f98e9d10f982ec754d8bc4ae878b159e SHA-1: 785cc2f5e2e0d91399352865805b2a43cffcac69 SHA-256: 348f93977077fbdd38207ad0ffd50a41586e0ecdce0af5345fbda2d638a642f2
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many of which point to other PDF files hosted on `fccsms.com`. These links appear to be part of a link farm designed to attract users searching for game-related cheats or downloads. The presence of a download button lure and the ML classifier's high confidence score indicate malicious intent. While no scripts were explicitly extracted, the PDF structure itself facilitates the embedding of links and potentially other malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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.xyz/app/479516143/how-to-add-mods-to-minecraft-pe-game-hack
    • http://fccsms.com/images/pokemon-go-free-64-bit_GM1094591345.pdf
    • http://fccsms.com/images/free-robux-com-no-verification_GM431946152.pdf
    • http://fccsms.com/images/free-coins-coin-master-2021_GM406889139.pdf
    • http://fccsms.com/images/free-spin-coin-master-2021-link_GM406889139.pdf
    • http://fccsms.com/images/coin-master-free-spins-blogspot_GM406889139.pdf
    • http://fccsms.com/images/windows-10-minecraft-free-with-java_GM479516143.pdf
    • http://fccsms.com/images/robux-only_GM431946152.pdf
    • http://fccsms.com/images/www-claim-gg-to-earn-free-robux_GM431946152.pdf
    • http://fccsms.com/images/games-that-give-you-free-robux_GM431946152.pdf
    • http://fccsms.com/images/how-to-hack-to-get-robux_GM431946152.pdf
    • http://fccsms.com/images/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdf
    • http://fccsms.com/images/roblox-prison-life-hack_GM431946152.pdf
    • http://fccsms.com/images/safe-hack-for-coin-master-android_GM406889139.pdf
    • http://fccsms.com/images/get-free-robux-now_GM431946152.pdf
    • http://fccsms.com/images/coin-master-hack-apk-link_GM406889139.pdf
    • http://fccsms.com/images/how-do-you-get-free-roblox_GM431946152.pdf
    • http://fccsms.com/images/roblox-free-robux-no-human-verification_GM431946152.pdf
    • http://fccsms.com/images/minecraft-windows-10-free_GM479516143.pdf
    • http://fccsms.com/images/coin-master-free-coins-and-spins-link_GM406889139.pdf
    • http://fccsms.com/images/roblox36com-free-robux_GM431946152.pdf
    • https://code.giftcards.com
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049e5.bin
f897c2ca1edcad4daf3832a8eb7e160702e08cdfcd9b0a1a67870c5360ca0e9c
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49E5 24892 bytes
font_01_sfnt_off00008243.bin
02b35010e2614e3cc95ac6414c49295350c91fdfcc4b4cad27ffdbc10e80df7f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8243 2912 bytes
font_02_sfnt_off00008c40.bin
3ccb4a0c8d8dd3a39612d5aadb8a83adb34010b200ffff10234a27dde113b5e3
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C40 18200 bytes