Malicious PDF — malware analysis report

Static analysis result for SHA-256 598efeeeebc35042…

MALICIOUS

PDF

46.6 KB Created: 2021-06-03 23:37:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 2c22e66a0ffa3a1bba634c70e8cf823f SHA-1: 9be706e55a69c074e41df98fd9694550dd3e10fe SHA-256: 598efeeeebc350421e3fa16b9e044651bd4931d6a1abc261d49a8526b153ca1a
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, identified as a "link farm" heuristic, pointing to sites offering "hacks" and "free spins." The ML classifier strongly indicated maliciousness, and the presence of external URIs suggests a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure itself facilitates the embedding of malicious links, likely intended to lead users to download unwanted software or provide personal information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

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/479516143/cool-minecraft-hacks-game-hack
    • http://katalog.iain-padangsidimpuan.ac.id/repository/coin-master-free-spins-2021-link_GM406889139.pdf
    • http://katalog.iain-padangsidimpuan.ac.id/repository/free-robux-app-real_GM431946152.pdf
    • http://katalog.iain-padangsidimpuan.ac.id/repository/how-do-i-get-free-spins-on-coin-master_GM406889139.pdf
    • http://katalog.iain-padangsidimpuan.ac.id/repository/free-spin-link-for-coin-master_GM406889139.pdf
    • http://katalog.iain-padangsidimpuan.ac.id/repository/how-to-get-free-robux-on-phone-2021_GM431946152.pdf
    • http://katalog.iain-padangsidimpuan.ac.id/repository/coin-master-daily-spin-free_GM406889139.pdf
    • http://katalog.iain-padangsidimpuan.ac.id/repository/how-to-get-a-refund-on-roblox-2021_GM431946152.pdf
    • http://katalog.iain-padangsidimpuan.ac.id/repository/coin-master-free-coins-facebook_GM406889139.pdf
    • http://katalog.iain-padangsidimpuan.ac.id/repository/claim-gg-free-robux_GM431946152.pdf
    • http://katalog.iain-padangsidimpuan.ac.id/repository/free-minecraft-windows-10-with-java_GM479516143.pdf
    • http://katalog.iain-padangsidimpuan.ac.id/repository/roblox-hackers-list_GM431946152.pdf
    • http://katalog.iain-padangsidimpuan.ac.id/repository/coin-master-hack-extension_GM406889139.pdf
    • http://katalog.iain-padangsidimpuan.ac.id/repository/free-robux-just-enter-username_GM431946152.pdf
    • http://katalog.iain-padangsidimpuan.ac.id/repository/coin-master-spin-hack_GM406889139.pdf
    • http://katalog.iain-padangsidimpuan.ac.id/repository/free-robux-codes-2021_GM431946152.pdf
    • http://katalog.iain-padangsidimpuan.ac.id/repository/is-minecraft-vr-free_GM479516143.pdf
    • http://katalog.iain-padangsidimpuan.ac.id/repository/free-roblox-outfits-2021_GM431946152.pdf
    • http://katalog.iain-padangsidimpuan.ac.id/repository/gameoffice-net-hack-coin-master_GM406889139.pdf
    • http://katalog.iain-padangsidimpuan.ac.id/repository/free-robux-no-verification-or-survey-2021_GM431946152.pdf
    • http://katalog.iain-padangsidimpuan.ac.id/repository/robux-free-2021_GM431946152.pdf
    • https://freegiftcodes.eu
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000052fb.bin
98fd48058044117838969fbea74f6702cc70c8c96d52cbda8429176a9511cadb		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52FB 24740 bytes
font_01_sfnt_off00008a77.bin
74d0ec127d749eeb725d2920918428201597b66d613da9f9acea3339f3a8fa37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A77 2884 bytes
font_02_sfnt_off0000946e.bin
052a8056d5e76bd054e8f6de415126dc7fc526d2c477c3dbde74b8be28c4271b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x946E 17956 bytes

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