Malicious PDF — malware analysis report

Static analysis result for SHA-256 389d5749a5f5d7aa…

MALICIOUS

PDF

46.5 KB Created: 2021-05-19 16:41:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c05954151462ac7bc677ee378287fc3c SHA-1: 11f782c4af7f67ff7107cbc5f822253ce648a2ce SHA-256: 389d5749a5f5d7aaf03ae2574504da68e36a5a0f56494d98cd7af865be0aecf5
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many with long, descriptive titles, suggesting a link farm for SEO spam. One prominent URL points to a "pokemon-go-free-or-shadow-mewtwo-game-hack" page, indicating a lure for potentially valuable or illicit content. The presence of numerous PDF links, some appearing to be generated or long-titled, further supports the SEO spam or malicious redirection hypothesis.

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/1094591345/pokemon-go-free-or-shadow-mewtwo-game-hack
    • http://www.ksmt.edu.np/assets/ckfinder/userfiles/files/how-do-u-hack-roblox_GM431946152.pdf
    • http://www.ksmt.edu.np/assets/ckfinder/userfiles/files/free-minecraft-account-and-password-2021_GM479516143.pdf
    • http://www.ksmt.edu.np/assets/ckfinder/userfiles/files/free-coins-and-spins-in-coin-master_GM406889139.pdf
    • http://www.ksmt.edu.np/assets/ckfinder/userfiles/files/minecraft-games-to-play-for-free_GM479516143.pdf
    • http://www.ksmt.edu.np/assets/ckfinder/userfiles/files/how-to-get-more-robux-for-free_GM431946152.pdf
    • http://www.ksmt.edu.np/assets/ckfinder/userfiles/files/hack-to-get-free-spins-on-coin-master_GM406889139.pdf
    • http://www.ksmt.edu.np/assets/ckfinder/userfiles/files/roblox-free-rubox_GM431946152.pdf
    • http://www.ksmt.edu.np/assets/ckfinder/userfiles/files/best-way-to-hack-coin-master_GM406889139.pdf
    • http://www.ksmt.edu.np/assets/ckfinder/userfiles/files/robux-offers_GM431946152.pdf
    • http://www.ksmt.edu.np/assets/ckfinder/userfiles/files/how-to-hack-coin-master-using-es-file_GM406889139.pdf
    • http://www.ksmt.edu.np/assets/ckfinder/userfiles/files/coin-master-free-link-facebook_GM406889139.pdf
    • http://www.ksmt.edu.np/assets/ckfinder/userfiles/files/roblox36com-free-robux_GM431946152.pdf
    • http://www.ksmt.edu.np/assets/ckfinder/userfiles/files/minecraft-free-edition_GM479516143.pdf
    • http://www.ksmt.edu.np/assets/ckfinder/userfiles/files/coin-master-free-daily-rewards_GM406889139.pdf
    • http://www.ksmt.edu.np/assets/ckfinder/userfiles/files/master-coin-hack-apk_GM406889139.pdf
    • http://www.ksmt.edu.np/assets/ckfinder/userfiles/files/coin-master-free-cards-link_GM406889139.pdf
    • http://www.ksmt.edu.np/assets/ckfinder/userfiles/files/earn-robux-sites_GM431946152.pdf
    • http://www.ksmt.edu.np/assets/ckfinder/userfiles/files/coin-master-hack-100-working_GM406889139.pdf
    • http://www.ksmt.edu.np/assets/ckfinder/userfiles/files/free-robux-discord_GM431946152.pdf
    • http://www.ksmt.edu.np/assets/ckfinder/userfiles/files/free-spins-on-coin-master-iphone_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004d06.bin
47e51ed59adfdb40359fc61b9e0ae16f2427437a19bbb06ea73c15ee6af87094		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D06 24396 bytes
font_01_sfnt_off000084b2.bin
d604882d067f38ff4432ec86d8d45aaa7ecb396595a9cea361fdc13fd6482674		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84B2 3908 bytes
font_02_sfnt_off0000926f.bin
03e678963861a5f70c56d4c5da75b2d24a3f0dade00699d2b113d6125d9cee9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x926F 18676 bytes

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