Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7f0bf2c917bcaa7…

MALICIOUS

PDF

33.9 KB Created: 2021-07-05 03:29:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 71c8d7e5fc360e66278748b200dde703 SHA-1: 6fa874af92108b2e3e20336d14cdb1755a65f741 SHA-256: b7f0bf2c917bcaa71143445dbd2656ac6ae31f05c18a4d29272c0392497ee642
102 Risk Score

Malware Insights

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

This PDF document contains numerous embedded URLs, many of which point to sites offering game hacks and cheats, such as 'robuxmatchcon-game-hack'. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to attract users searching for such content. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent. The document body, though partially garbled, also contains URLs related to game cheats.

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/robuxmatchcon-game-hack
    • http://perpustakaan.ipts.ac.id/repository/free-robux-2021_GM431946152.pdf
    • http://perpustakaan.ipts.ac.id/repository/coin-master-village-4_GM406889139.pdf
    • http://perpustakaan.ipts.ac.id/repository/latest-roblox-hacks-2021_GM431946152.pdf
    • http://perpustakaan.ipts.ac.id/repository/how-to-get-750k-robux-for-free_GM431946152.pdf
    • http://perpustakaan.ipts.ac.id/repository/call-of-robloxia-5-roblox-at-war-cheats_GM431946152.pdf
    • http://perpustakaan.ipts.ac.id/repository/coin-master-hack-apk-free-download_GM406889139.pdf
    • http://perpustakaan.ipts.ac.id/repository/free-spins-for-coin-master-2021_GM406889139.pdf
    • http://perpustakaan.ipts.ac.id/repository/hack-de-roblox-dinero-rozitizens_GM431946152.pdf
    • http://perpustakaan.ipts.ac.id/repository/free-roblox-stuff-catalog_GM431946152.pdf
    • http://perpustakaan.ipts.ac.id/repository/free-gift-cars-for-roblox_GM431946152.pdf
    • http://perpustakaan.ipts.ac.id/repository/how-to-download-roblox-walk-through-walls-hack_GM431946152.pdf
    • http://perpustakaan.ipts.ac.id/repository/free-roblox-packs_GM431946152.pdf
    • http://perpustakaan.ipts.ac.id/repository/how-to-hack-your-robux-with-cheat-engine-64_GM431946152.pdf
    • http://perpustakaan.ipts.ac.id/repository/cmo-hackear-a-la-gente-en-roblox-jailbreak_GM431946152.pdf
    • http://perpustakaan.ipts.ac.id/repository/what-games-on-roblox-give-you-free-robux_GM431946152.pdf
    • http://perpustakaan.ipts.ac.id/repository/how-to-get-hacks-on-roblox-booga-booga_GM431946152.pdf
    • http://perpustakaan.ipts.ac.id/repository/free-codes-for-robux-on-roblox_GM431946152.pdf
    • http://perpustakaan.ipts.ac.id/repository/como-tener-anti-gravedad-en-roblox-hack-check-crashed_GM431946152.pdf
    • http://perpustakaan.ipts.ac.id/repository/roblox-nike-shirt-free-shipping_GM431946152.pdf
    • http://perpustakaan.ipts.ac.id/repository/free-face-maker-for-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002d9c.bin
0eada4959fa75925c6fcb388f25a125801b0abf6b7d02d02069c038a11ba6849		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D9C 22396 bytes
font_01_sfnt_off00005f4f.bin
22fb853357d700a883506443e03244379ebe89dfe763389f41fb0df375e68649		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F4F 19084 bytes

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