Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0e7be1f36f455a3…

MALICIOUS

PDF

44.0 KB Created: 2021-06-03 08:25:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ba09048c2dc290c8cc287aee1027e97e SHA-1: 7aef46245935db6063fd18446e5af5e3874df377 SHA-256: f0e7be1f36f455a32ef7b61865fc102746c8b86c4528da6ac8f95cf69b3f6f51
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs that point to SEO-optimized PDF files, suggesting a link farm designed to distribute malicious content. The presence of a 'download button' lure and a high ML classifier score further indicate malicious intent. The primary URL, https://netcdn.online/app/431946152/roblox-free-followers-game-hack, is likely the initial distribution point for a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/431946152/roblox-free-followers-game-hack
    • http://muslib.unmus.ac.id/repository/coin-master-villages_GM406889139.pdf
    • http://muslib.unmus.ac.id//repository/how-do-you-get-roebucks-for-free_GM431946152.pdf
    • http://muslib.unmus.ac.id/repository/coin-master-links-that-don-t-expire_GM406889139.pdf
    • http://muslib.unmus.ac.id/repository/coin-master-free-spins-no-human-verification_GM406889139.pdf
    • http://muslib.unmus.ac.id/repository/game-give-free-robux_GM431946152.pdf
    • http://muslib.unmus.ac.id/repository/how-to-get-free-robux-on-pc_GM431946152.pdf
    • http://muslib.unmus.ac.id/repository/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdf
    • http://muslib.unmus.ac.id/repository/free-robux-for-kids-no-verification_GM431946152.pdf
    • http://muslib.unmus.ac.id/repository/coin-master-hack-android-root_GM406889139.pdf
    • http://muslib.unmus.ac.id/repository/free-coin-master-spins-for-today_GM406889139.pdf
    • http://muslib.unmus.ac.id/repository/coin-master-heaven-daily-free-spins-and-coins-links_GM406889139.pdf
    • http://muslib.unmus.ac.id/repository/by-pubg-uc-free_GM1330123889.pdf
    • http://muslib.unmus.ac.id/repository/free-spins-generated-from-coin-master_GM406889139.pdf
    • http://muslib.unmus.ac.id/repository/free-spin-coin_GM406889139.pdf
    • http://muslib.unmus.ac.id/repository/free-card-link-coin-master_GM406889139.pdf
    • http://muslib.unmus.ac.id//repository/free-robux-only-1-step_GM431946152.pdf
    • http://muslib.unmus.ac.id/repository/coin-master-35-13-hack-download_GM406889139.pdf
    • http://muslib.unmus.ac.id/repository/coin-master-cards-free-cards_GM406889139.pdf
    • http://muslib.unmus.ac.id//repository/how-to-change-your-username-on-roblox-for-free-2021_GM431946152.pdf
    • http://muslib.unmus.ac.id/repository/coin-master-free-spin-codes_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005080.bin
acd952874131f09d676e7996b1d5d1ada41a986c597e4f5a9aafbc321d29e8e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5080 24796 bytes
font_01_sfnt_off000089b8.bin
09eaf6273d9322970c88a31482dbdf968207cb1ef73b55d7fd121c1bcc1f7e48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89B8 18112 bytes

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