Malicious PDF — malware analysis report

Static analysis result for SHA-256 fddae7097e78df58…

MALICIOUS

PDF

46.4 KB Created: 2021-05-16 15:03:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 2ca51ba49a42e5465c60c472074d4488 SHA-1: 3136cd2a52f78f8bd2b690b97455777293089af1 SHA-256: fddae7097e78df587b6841e5fa3a84e3e925a2acf0897f051c1cfe5a3b0956dc
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, many of which point to external sites. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of these links, suggesting an attempt to create a link farm or distribute malicious content. The presence of a download button lure and ML classification further support a malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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.xyz/app/406889139/fbchampion-game-hack
    • https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/coin-master-free-shield-link_GM406889139.pdf
    • https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/coin-master-card-hack-app_GM406889139.pdf
    • https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/coin-master-free-daily-spins-link_GM406889139.pdf
    • https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/free-robux-sites-that-work_GM431946152.pdf
    • https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/get-minecraft-for-free_GM479516143.pdf
    • https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/coin-master-free-spin-and-coin-links_GM406889139.pdf
    • https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/coin-master-free-cards-link_GM406889139.pdf
    • https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/online-coin-master-hack-here_GM406889139.pdf
    • https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/get-roblox-for-free_GM431946152.pdf
    • https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/coin-master-attack-hack_GM406889139.pdf
    • https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/coin-master-links-free-spins_GM406889139.pdf
    • https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/games-to-get-free-robux_GM431946152.pdf
    • https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/hack-a-game_GM431946152.pdf
    • https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/bloxpink-free-robux_GM431946152.pdf
    • https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/robux-free-co_GM431946152.pdf
    • https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/free-robux-no-verify-2021_GM431946152.pdf
    • https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/hacker-coin-master_GM406889139.pdf
    • https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master-without-waiting_GM406889139.pdf
    • https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdf
    • https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/toolbox-for-minecraft-ios_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004f5e.bin
54b6b42e0ba44c0a6f7195184268844071b845b00ce225bf54ea744222d72df9		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F5E 25176 bytes
font_01_sfnt_off0000896d.bin
3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676		 pdf-font-stream PDF embedded font (sfnt) at offset 0x896D 2840 bytes
font_02_sfnt_off0000931e.bin
a6b0af27d4d3b45433f1bf9322c4fc5530f0836706fea914cb1eef9ee3408c10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x931E 18364 bytes

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