Malicious PDF — malware analysis report

Static analysis result for SHA-256 6904a38ebe961ceb…

MALICIOUS

PDF

44.6 KB Created: 2021-06-08 09:12:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 12c0b7acbe4d28705c0f287b2214033b SHA-1: acba15d081d114806c21c941ed1af50fd43d64c6 SHA-256: 6904a38ebe961cebf70b288205370a9659853802fca2dc21eb3d7ac13311ba0b
102 Risk Score

Malware Insights

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

This PDF document contains numerous external links, many of which are structured as a link farm for SEO purposes, suggesting a malicious intent to redirect users to potentially harmful sites. The document body, though heavily obfuscated, contains a URL that appears to be a lure for free in-game items, aligning with common phishing or scam tactics. The ML classifier strongly indicated maliciousness, and the presence of external URIs and a link farm heuristic further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/406889139/free-spin-sites-for-coin-master-game-hack
    • https://maniclampungtimur.sch.id/__statics/gudangsoal/files/hack-coin-master-link_GM406889139.pdf
    • https://maniclampungtimur.sch.id/__statics/gudangsoal/files/free-robux-generator-for-roblox-2021_GM431946152.pdf
    • https://maniclampungtimur.sch.id/__statics/gudangsoal/files/games-on-roblox-that-give-you-free-robux_GM431946152.pdf
    • https://maniclampungtimur.sch.id/__statics/gudangsoal/files/free-minecraft-java-edition-codes_GM479516143.pdf
    • https://maniclampungtimur.sch.id/__statics/gudangsoal/files/coin-master-free-spin-and-coin-link-app_GM406889139.pdf
    • https://maniclampungtimur.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-hack_GM431946152.pdf
    • https://maniclampungtimur.sch.id/__statics/gudangsoal/files/coin-master-free-spin-link-today-50_GM406889139.pdf
    • https://maniclampungtimur.sch.id/__statics/gudangsoal/files/free-robux-on-phone_GM431946152.pdf
    • https://maniclampungtimur.sch.id/__statics/gudangsoal/files/i-got-hacked-on-roblox_GM431946152.pdf
    • https://maniclampungtimur.sch.id/__statics/gudangsoal/files/minecraft-pe-server-hosting-free_GM479516143.pdf
    • https://maniclampungtimur.sch.id/__statics/gudangsoal/files/roblox-points_GM431946152.pdf
    • https://maniclampungtimur.sch.id/__statics/gudangsoal/files/roblox-free-clothes-hack_GM431946152.pdf
    • https://maniclampungtimur.sch.id/__statics/gudangsoal/files/hack-coin-master-nyc_GM406889139.pdf
    • https://maniclampungtimur.sch.id/__statics/gudangsoal/files/free-coin-master-spin-daily-link_GM406889139.pdf
    • https://maniclampungtimur.sch.id/__statics/gudangsoal/files/free-stuff-on-roblox_GM431946152.pdf
    • https://maniclampungtimur.sch.id/__statics/gudangsoal/files/coin-master-free-soins_GM406889139.pdf
    • https://maniclampungtimur.sch.id/__statics/gudangsoal/files/how-to-hack-people-in-roblox_GM431946152.pdf
    • https://maniclampungtimur.sch.id/__statics/gudangsoal/files/coin-master-hack-for-android_GM406889139.pdf
    • https://maniclampungtimur.sch.id/__statics/gudangsoal/files/free-robux-real-2021_GM431946152.pdf
    • https://maniclampungtimur.sch.id/__statics/gudangsoal/files/coin-master-free-spins-only_GM406889139.pdf
    • https://www.urcouponsdeal.com/2019/03/coin-master-free-spin-and-coin-links.html
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000536b.bin
70ca2fe64b70f8f12473f39901925a5200d1057a8f841cec2d547522dddce1b7		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x536B 25248 bytes
font_01_sfnt_off00008cd2.bin
a210d42f6902d7d9d5bff07919c8107c405d033dd36282e8d99cfff98ec98e98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CD2 17884 bytes

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