Malicious PDF — malware analysis report

Static analysis result for SHA-256 79e873cd370c162c…

MALICIOUS

PDF

34.0 KB Created: 2021-07-06 10:12:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 004d1bce6306fd9110e492078cf4c681 SHA-1: ae3a9abdd31e3cda60fe0d9599e0de8b3ef701d7 SHA-256: 79e873cd370c162c158677b96b684f0ce29ce86c283ca970945bb9a8007a6fcd
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous links to external websites, many of which are related to 'free Robux' or 'Coin Master spins' and are likely part of a scam or phishing operation. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to attract traffic or distribute malicious content. The presence of embedded URLs and the document body content further support the conclusion that this PDF is intended to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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 http://netcdn.tw/app/431946152/how-to-get-free-robux-no-human-verification-2021-game-hack
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/coin-master-free-spin-and-coins-fbid-links_GM406889139.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/coin-master-game-hack-app-download_GM406889139.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/how-to-get-20210-robux-for-free_GM431946152.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/roblox-hack-android-1-com_GM431946152.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/free-robux-no-verification-no-download_GM431946152.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/coin-master-daily-free-spins-link-2021_GM406889139.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/free-robux-generator-2021-no-human-verification_GM431946152.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/blue-stacks-robux-hack_GM431946152.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/forum-comment-cheat-sur-roblox_GM431946152.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/speed-hack-using-check-cashed-on-roblox_GM431946152.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/free-robux-promo-codes_GM431946152.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/best-free-roblox-executor_GM431946152.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/free-spins-coin-master-android_GM406889139.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/get-free-robux-now_GM431946152.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/how-to-get-roblox-premium-for-free-2021_GM431946152.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/how-do-you-get-free-food-in-coin-master_GM406889139.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/como-hackear-juego-coin-master_GM406889139.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/javascript-free-robux_GM431946152.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/robuxmatchcom-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002dd0.bin
8febe05d64138e49e7b51dd93ce240c4594372e77fb913b0cc9df53ff7d53651		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2DD0 21884 bytes
font_01_sfnt_off00005dc7.bin
071133fbd72890720303c8ecaa5d80d0b8671e9ee25b91c9a58bd6e8411eacd6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DC7 19900 bytes

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