Malicious PDF — malware analysis report

Static analysis result for SHA-256 19295dd4dfda34eb…

MALICIOUS

PDF

34.8 KB Created: 2021-06-30 09:41:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 482089217226376b3970aba45a42559f SHA-1: 6e5d758d31b6c9e7e4c3f8328fc9bed0d18349a0 SHA-256: 19295dd4dfda34eb40d221bda45bb401ea1da34899f9a3a78fcb4f3045140faf
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous links to external websites, many of which are structured as SEO link farms. These links promise hacks and free in-game currency for popular games, suggesting a lure to download malicious payloads. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.co/app/431946152/how-to-hack-roblox-no-download-game-hack
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/roblox-apk-hack_GM431946152.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/best-hack-to-get-free-robux_GM431946152.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/coin-master-no-download-app-but-play-for-free_GM406889139.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/twitter-coin-master-free-spins_GM406889139.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/microsoft-free-robux_GM431946152.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/coin-master-free-spins-moonactive_GM406889139.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/how-to-get-free-robux-fast-and-easy_GM431946152.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/how-to-make-roblox-clothes-for-free_GM431946152.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/free-roblox-users-with-robux_GM431946152.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/coin-master-free-spin-best-link_GM406889139.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/coin-master-free-cards-link-2021_GM406889139.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/avatar-de-roblox_GM431946152.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/how-to-get-free-robux-no-human-verification_GM431946152.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/how-to-get-free-items-on-roblox_GM431946152.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/freerubux_GM431946152.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/sites-to-get-free-robux_GM431946152.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/4-step-way-to-get-free-robux-2021-november_GM431946152.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/roblox-stranger-things-promo-codes-cheat_GM431946152.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/pokemon-go-free-unblocked_GM1094591345.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/how-do-you-get-free-tiktok-followers_GM835599320.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fdd.bin
15deb9314a894e0839830cd10f37259d5b87436d90379ee4716bfb0ff3ff38c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2FDD 22596 bytes
font_01_sfnt_off00006272.bin
56f4b775979fbfde9ca682cd433763fe8509577a7f0d2a58de122703ec7a63f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6272 19160 bytes

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