Malicious PDF — malware analysis report

Static analysis result for SHA-256 825a369b93e27f63…

MALICIOUS

PDF

42.7 KB Created: 2021-05-20 00:12:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 061201fdac05d91077f2ace3ce2012ca SHA-1: e1b0874eeb6dbafffec70dd0872a29a3261550c5 SHA-256: 825a369b93e27f638ce63eb7a97afb639e337e3d9751fb6e406ae53a866d6750
102 Risk Score

Malware Insights

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

The PDF document contains a significant number of external links, many of which are SEO-optimized and point to pages offering game hacks and cheats. This suggests a lure to download potentially unwanted or malicious applications. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/406889139/coin-master-apk-hack-3.2-game-hack
    • https://repository.stikesindramayu.ac.id/repository/https-iosgodscom-topic-20218flipmastercoinshack_GM406889139.pdf
    • https://repository.stikesindramayu.ac.id/repository/is-minecraft-free-on-nintendo-switch_GM479516143.pdf
    • https://repository.stikesindramayu.ac.id/repository/how-to-get-free-spins-on-coin-master-without-verification_GM406889139.pdf
    • https://repository.stikesindramayu.ac.id/repository/free-robux-websites-no-human-verification_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/roblox-free-robux-hack_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/minecraft-free-computer-game_GM479516143.pdf
    • https://repository.stikesindramayu.ac.id/repository/free-robux-no-verification-at-all_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/coin-master-game-2021-free-spin-link_GM406889139.pdf
    • https://repository.stikesindramayu.ac.id/repository/coin-master-spin-free_GM406889139.pdf
    • https://repository.stikesindramayu.ac.id/repository/coin-master-hack-online-no-human-verification_GM406889139.pdf
    • https://repository.stikesindramayu.ac.id/repository/roblox-bloxburg-hack_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/how-do-you-get-free-robux-without-paying_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/coin-master-free-coins-and-spins-hack_GM406889139.pdf
    • https://repository.stikesindramayu.ac.id/repository/how-to-hack-into-someones-roblox-account_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/free-robux-codes-no-verification-2021_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/minecraft-on-computer-free_GM479516143.pdf
    • https://repository.stikesindramayu.ac.id/repository/coin-master-daily-free-spins-link-today-twitter_GM406889139.pdf
    • https://repository.stikesindramayu.ac.id/repository/free-coins-on-coin-master-without-verification_GM406889139.pdf
    • https://repository.stikesindramayu.ac.id/repository/free-coin-master-hack-no-verification_GM406889139.pdf
    • https://repository.stikesindramayu.ac.id/repository/robux-com-free_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c03.bin
7e23f3bc58b47e59296dd7bb095941b8aa4d368290b77c4d17ac00ab8118b664		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C03 25236 bytes
font_01_sfnt_off00008480.bin
ea1725c6c01ea87f710175a69d8af0aa870f8ca7c85f9b36b7cf8826adfef3f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8480 18256 bytes

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