Malicious PDF — malware analysis report

Static analysis result for SHA-256 06d3b2463fbd86d5…

MALICIOUS

PDF

42.3 KB Created: 2021-05-12 03:11:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 7f7f43d62b820f342b21ba99b676f724 SHA-1: de33db038b7cd2af3c58efebd1d317ceeba6f242 SHA-256: 06d3b2463fbd86d51b7dd277f80585b28dac794b9e531f9ded56fcbbd7f0f58f
102 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which appear to be part of a link farm designed to direct users to potentially malicious content, such as application downloads. The presence of a 'download button' heuristic further supports the malicious intent of luring users to external sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/hack-coin-master-apk-3.2-game-hack
    • https://elearning.min1bangkalan.com/__statics/gudangsoal/files/free-roblox-items-codes_GM431946152.pdf
    • https://elearning.min1bangkalan.com/__statics/gudangsoal/files/roblox-re_GM431946152.pdf
    • https://elearning.min1bangkalan.com/__statics/gudangsoal/files/free-robux-games-that-actually-work-2021_GM431946152.pdf
    • https://elearning.min1bangkalan.com/__statics/gudangsoal/files/free-minecraft-skin-maker_GM479516143.pdf
    • https://elearning.min1bangkalan.com/__statics/gudangsoal/files/how-to-get-free-robux-on-pc_GM431946152.pdf
    • https://elearning.min1bangkalan.com/__statics/gudangsoal/files/coun-master_GM406889139.pdf
    • https://elearning.min1bangkalan.com/__statics/gudangsoal/files/daily-free-spins-coin-master_GM406889139.pdf
    • https://elearning.min1bangkalan.com/__statics/gudangsoal/files/coin-master-free-spins-hack-but-no-surveys_GM406889139.pdf
    • https://elearning.min1bangkalan.com/__statics/gudangsoal/files/how-to-get-free-hats-on-roblox_GM431946152.pdf
    • https://elearning.min1bangkalan.com/__statics/gudangsoal/files/minecraft-pocket-edition-free-apk_GM479516143.pdf
    • https://elearning.min1bangkalan.com/__statics/gudangsoal/files/free-robux-codes-2021-not-used_GM431946152.pdf
    • https://elearning.min1bangkalan.com/__statics/gudangsoal/files/free-coin-master-spins-hack_GM406889139.pdf
    • https://elearning.min1bangkalan.com/__statics/gudangsoal/files/how-to-log-out-of-coin-master_GM406889139.pdf
    • https://elearning.min1bangkalan.com/__statics/gudangsoal/files/free-robux-codes-2021_GM431946152.pdf
    • https://elearning.min1bangkalan.com/__statics/gudangsoal/files/coin-master-hack-2021-no-human-verification_GM406889139.pdf
    • https://elearning.min1bangkalan.com/__statics/gudangsoal/files/coin-master-free-spins-link-download-for-iphone_GM406889139.pdf
    • https://elearning.min1bangkalan.com/__statics/gudangsoal/files/coin-master-spins-hack-2021_GM406889139.pdf
    • https://elearning.min1bangkalan.com/__statics/gudangsoal/files/free-coin-master-spins-link_GM406889139.pdf
    • https://elearning.min1bangkalan.com/__statics/gudangsoal/files/how-to-get-free-robux-hack_GM431946152.pdf
    • https://elearning.min1bangkalan.com/__statics/gudangsoal/files/free-robux-com-no-verification_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a6b.bin
8b945c35c77e0ff172ac1d7589996a1a95f34a216b74ed82c58c910c631203ad		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A6B 24696 bytes
font_01_sfnt_off0000830a.bin
2de3a067c92fd750cac538864d09afc8d4d9cd3de69932c6374fba6ea057edab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x830A 18256 bytes

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