Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f121cddadbf1c4b…

MALICIOUS

PDF

47.2 KB Created: 2021-06-03 08:18:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 25c8966301df397c04f24349cd102b8e SHA-1: dc4fc070a1cc20340d3aff87a2cef17fdfa64290 SHA-256: 6f121cddadbf1c4b1e3aefb170259ea229c83e75b6b6583cb7a32a426e7f8a44
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many of which appear to be part of a link farm designed to attract traffic. The ML classifier strongly indicated maliciousness, and the presence of a download button lure further supports a malicious intent. The document's content and structure suggest it is designed to trick users into visiting potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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.online/app/406889139/coin-master-game-game-hack
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id/repository/coin-master-free-spins-link-blogspot_GM406889139.pdf
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id/repository/coin-master-hack-progamers_GM406889139.pdf
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id//repository/free-coins-and-spins-for-coin-master-game_GM406889139.pdf
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id//repository/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdf
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id//repository/free-robux-no-human-verification-no-survey_GM431946152.pdf
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id//repository/coin-master-hack-tuts_GM406889139.pdf
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id//repository/roblox-hacks-2021_GM431946152.pdf
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id/repository/coin-master-free-spins-link-hack_GM406889139.pdf
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id//repository/how-to-get-free-robux-youtube_GM431946152.pdf
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id//repository/coin-master-free-coins-and-spins-app_GM406889139.pdf
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id//repository/2021-no-human-verification-hack-for-coin-master_GM406889139.pdf
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id//repository/minecraft-free-minecoins_GM479516143.pdf
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id/repository/wurst-client-18-9_GM479516143.pdf
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id//repository/free-robux-websites-that-actually-work_GM431946152.pdf
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id/repository/blox-supply-free-robux_GM431946152.pdf
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id//repository/free-roblox-adopt-me-pets_GM431946152.pdf
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id/repository/offers-to-complete-and-get-free-spins-in-coin-master_GM406889139.pdf
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id/repository/coin-master-free-gold-cards-link_GM406889139.pdf
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id/repository/free-to-play-minecraft-servers_GM479516143.pdf
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id//repository/coin-master-hack-apk-download-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050be.bin
34c750b2b073b32439e3e186bbc97ddebc8c8c2b06506a0bc83db30df2b7eb7a		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50BE 25028 bytes
font_01_sfnt_off00008969.bin
30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8969 2840 bytes
font_02_sfnt_off0000931b.bin
85fdcd94ace20ff3f96896fe61ac97a9a9bb6d5de95eb3ca58f16688d648ca50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x931B 19136 bytes

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