Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c7ca70b4debc84d…

MALICIOUS

PDF

43.5 KB Created: 2021-06-04 02:26:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ca07763d630c8262ccdc14dc00bdf974 SHA-1: ec759fcc26af60c5e928658ce824e4527850cb2a SHA-256: 9c7ca70b4debc84d30165538006461a926be35a6d3c40ca91a17bd1afa733764
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of external links, many of which are related to game cheats and hacks, suggesting a link farm or SEO manipulation tactic. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links indicate an attempt to redirect users to potentially harmful content.

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/406889139/where-can-i-get-free-spins-for-coin-master-game-hack
    • http://elibrary.smknesbu.sch.id/repository/hacks-para-roblox_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/google-how-do-you-get-robux_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-coins-and-spins-coin-master_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-spins-for-coin-master_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-minecraft-pe-for-free_GM479516143.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-free-spins-on-coin-master-2021-links_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/daily-free-spins-coin-master_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-free-roblox-money_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-foxy-food_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/show-me-how-to-get-free-robux_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-attack-link_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/is-minecraft-free-on-nintendo-switch_GM479516143.pdf
    • http://elibrary.smknesbu.sch.id/repository/pokemon-go-free-coins-promo-code_GM1094591345.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-fan-page-free-spins_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-gold-cards-hack-english_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-free-robux-on-computer_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/instagram-coin-master-free-spins_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-spin-coin-master-instagram_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/microsoft-bing-robux_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-2021-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004eee.bin
d5a317f9efa4ecb1ecda1a12fda193214bddeee51ad8eedad4b2ca92907205b4		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EEE 24688 bytes
font_01_sfnt_off00008780.bin
8779a24c74e66c23b33121dd1a71955adfc2f322ab09b0870da4a74651533123		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8780 18248 bytes

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