Malicious PDF — malware analysis report

Static analysis result for SHA-256 745f9f401a7df6f4…

MALICIOUS

PDF

49.2 KB Created: 2021-06-09 05:48:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1c3d179c850ba268a14ab2a3bb3f6076 SHA-1: 09a457c4a785130253264f5d6ec5e4cbdf63b97b SHA-256: 745f9f401a7df6f44a9ef35f3de07bd1567d9600ce6487ce612da9e95b73a639
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains a large number of external links, many of which appear to be SEO-optimized for game-related hacks and cheats. The document body, though partially corrupted, contains a title related to hacking Roblox accounts and an embedded URL. The presence of a "download button" heuristic further suggests a malicious intent to trick users into downloading potentially harmful content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.tw/app/431946152/hack-para-hackear-cuentas-de-roblox-game-hack
    • http://stmb-multismart.ac.id/perpustakaan/repository/minecraft-hack-2021_GM479516143.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/where-can-i-get-free-spins-for-coin-master_GM406889139.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/coin-master-cheats-2021_GM406889139.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/roblox-hack-generator-without-human-verification_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/roblox-arsenal-hack_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/roblox-free-t-shirt-nike_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/coin-master-spin-hack-without-verification_GM406889139.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/coin-master-hack-spins-apk-download_GM406889139.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/body-roblox_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/20210-free-spin-links-for-coin-master_GM406889139.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/today-free-spin-coin-master_GM406889139.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/free-25-spins-coin-master-links_GM406889139.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/microsoft-robux_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/how-to-free-robux_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/coin-master-daily-free-spins-link-today-2021_GM406889139.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/roblox-free-robux-net_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/roblox-easy-hacks-to-get-no-virouses_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/how-to-install-minecraft-for-free_GM479516143.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/can-you-get-hacked-on-roblox-when-giving-dis_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/coin-master-free-spins-only_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005095.bin
1fe88dc91abd5914afd0350cce84ad465bd27342f9579d3f33aede0f649b9028		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5095 25400 bytes
font_01_sfnt_off00008bbc.bin
fa93de321190668b294ff46149e4b98ac349b4fd022dcee9ecd964f7f59f3f9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BBC 6768 bytes
font_02_sfnt_off00009bfb.bin
b4bf4658e3ac05bd1f678b5536a89a6e3809a3afc7b61ae908c5eedce665d00a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BFB 18748 bytes

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