Malicious PDF — malware analysis report

Static analysis result for SHA-256 e43b73b5882a5726…

MALICIOUS

PDF

33.7 KB Created: 2021-07-05 18:25:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 0647d5798035e3cb74082ab2a76ff880 SHA-1: 12fa21e614c53804c91c0b6a697412eec598daa6 SHA-256: e43b73b5882a57267b6faa32b39dc44289e18ee3ae623dec6f579e97f453c3bb
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous links to external resources, many of which are presented as hacks or cheats for popular games. The ML classifier strongly indicated maliciousness, and the presence of a link farm heuristic suggests an attempt to drive traffic to potentially harmful sites. The document body, though truncated, contains URLs that likely lead to malware or phishing content.

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/rise-of-nations-roblox-hack-game-hack
    • https://library.sman1berau.sch.id/repository/how-to-make-your-own-minecraft-server-for-free_GM479516143.pdf
    • https://library.sman1berau.sch.id/repository/hack-para-anime-cross-roblox_GM431946152.pdf
    • https://library.sman1berau.sch.id/repository/coin-master-free-spins-apk-2021_GM406889139.pdf
    • https://library.sman1berau.sch.id/repository/how-do-you-get-roblox-for-free_GM431946152.pdf
    • https://library.sman1berau.sch.id/repository/how-to-get-free-robux-with-no-verification_GM431946152.pdf
    • https://library.sman1berau.sch.id/repository/free-spin-link-in-coin-master-game_GM406889139.pdf
    • https://library.sman1berau.sch.id/repository/pubg-uc-event_GM1330123889.pdf
    • https://library.sman1berau.sch.id/repository/how-to-get-free-robux-games_GM431946152.pdf
    • https://library.sman1berau.sch.id/repository/minecraft-world-free-download_GM479516143.pdf
    • https://library.sman1berau.sch.id/repository/free-coin-master-spin-generator_GM406889139.pdf
    • https://library.sman1berau.sch.id/repository/get-free-spins-on-coin-master_GM406889139.pdf
    • https://library.sman1berau.sch.id/repository/roblox-2021_GM431946152.pdf
    • https://library.sman1berau.sch.id/repository/javascript-free-robux_GM431946152.pdf
    • https://library.sman1berau.sch.id/repository/coin-master-free-cards-link_GM406889139.pdf
    • https://library.sman1berau.sch.id/repository/how-to-get-free-robux-fast_GM431946152.pdf
    • https://library.sman1berau.sch.id/repository/free-copy-hack-roblox_GM431946152.pdf
    • https://library.sman1berau.sch.id/repository/rbx-free-robux_GM431946152.pdf
    • https://library.sman1berau.sch.id/repository/coin-master-free-spin-link-daily_GM406889139.pdf
    • https://library.sman1berau.sch.id/repository/free-coin-master-spins-link_GM406889139.pdf
    • https://library.sman1berau.sch.id/repository/hack-coin-master-ios_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002dea.bin
49909ecf60a98364acc142a3db5e7284d374be72bd092a625788fc76437bd8c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2DEA 22172 bytes
font_01_sfnt_off00005f1a.bin
c5b6d97e5bf0a279ed656bbc641a5b61b65e35826ea5696990f8cb4861aac6ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F1A 18880 bytes

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