Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f6ae3bbb313befb…

MALICIOUS

PDF

43.9 KB Created: 2021-05-10 20:54:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 82a4196b30dd2fb13c81dd348d8fb9df SHA-1: d39395c01a63b66223d473ff6b48aa32aafd800b SHA-256: 1f6ae3bbb313befba7a46830a34f2e21f9b617663c9a6043092839487de4ce23
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous external links, identified as a link farm, suggesting a tactic to drive traffic to other sites. The primary URL points to a resource related to 'free minecraft account', indicating a lure for potentially unwanted or malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/479516143/free-minecraft-account-reddit-game-hack
    • https://www.indahkonveksi.com/ckfinder/userfiles/files/minecraft-logo-maker-free_GM479516143.pdf
    • https://www.indahkonveksi.com/ckfinder/userfiles/files/free-roblox-avatar_GM431946152.pdf
    • https://www.indahkonveksi.com/ckfinder/userfiles/files/need-free-spins-for-coin-master_GM406889139.pdf
    • https://www.indahkonveksi.com/ckfinder/userfiles/files/daily-coin-master-free-spin-apk_GM406889139.pdf
    • https://www.indahkonveksi.com/ckfinder/userfiles/files/coin-game_GM406889139.pdf
    • https://www.indahkonveksi.com/ckfinder/userfiles/files/get-free-spins-coin-master-2021_GM406889139.pdf
    • https://www.indahkonveksi.com/ckfinder/userfiles/files/how-to-hack-coin-master-apple_GM406889139.pdf
    • https://www.indahkonveksi.com/ckfinder/userfiles/files/how-to-get-free-clothes-on-roblox-2021_GM431946152.pdf
    • https://www.indahkonveksi.com/ckfinder/userfiles/files/free-roblox-accounts-with-builders-club_GM431946152.pdf
    • https://www.indahkonveksi.com/ckfinder/userfiles/files/minecraft-java-edition-free-download-for-android_GM479516143.pdf
    • https://www.indahkonveksi.com/ckfinder/userfiles/files/coin-master-hack-online-no-human-verification_GM406889139.pdf
    • https://www.indahkonveksi.com/ckfinder/userfiles/files/simplysarc_GM479516143.pdf
    • https://www.indahkonveksi.com/ckfinder/userfiles/files/coin-master-daily-free-spins-blogspot_GM406889139.pdf
    • https://www.indahkonveksi.com/ckfinder/userfiles/files/download-hacked-games-com-coin-master_GM406889139.pdf
    • https://www.indahkonveksi.com/ckfinder/userfiles/files/coin-master-hack-spin-160-pro_GM406889139.pdf
    • https://www.indahkonveksi.com/ckfinder/userfiles/files/free-robux-hack-us_GM431946152.pdf
    • https://www.indahkonveksi.com/ckfinder/userfiles/files/coin-master-free-pet-snacks_GM406889139.pdf
    • https://www.indahkonveksi.com/ckfinder/userfiles/files/coin-master-free-spins-link-deutsch-ios_GM406889139.pdf
    • https://www.indahkonveksi.com/ckfinder/userfiles/files/how-to-earn-robux_GM431946152.pdf
    • https://www.indahkonveksi.com/ckfinder/userfiles/files/windows-10-minecraft-hacks_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004d07.bin
f97df97a33be4427ee696cd8a8701252d43f5667af4abdabc146d1f088200008
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D07 26348 bytes
font_01_sfnt_off00008a52.bin
06706ad336338b7ad3fbc0c92e8d54cad43b148c9035f6d20b1c8b9e0858b525
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A52 18024 bytes