Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9cc02cfec9efef1…

MALICIOUS

PDF

42.1 KB Created: 2021-06-03 05:12:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c5d8c449820f1461d61b2c23f7a52a24 SHA-1: f1f9abc49062933e4e437a49ff49c51d7631dced SHA-256: d9cc02cfec9efef17b746931048868f76a461cb886eff546d86c9ae1f4064b71
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 an SEO link farm. The document body and extracted URLs suggest a lure related to game cheats or hacks, such as 'Coin Master' or 'Roblox'. The presence of embedded URLs and the ML classifier's high confidence score indicate malicious intent, likely to redirect users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

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/how-to-get-free-coins-in-coin-master-game-hack
    • http://lib.fekon.untad.ac.id/repository/how-to-get-free-robux_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/moonactive-coin-master-free-spins_GM406889139.pdf
    • http://lib.fekon.untad.ac.id/repository/twitter-coin-master-free-spins_GM406889139.pdf
    • http://lib.fekon.untad.ac.id/repository/what-do-roblox-points-do_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/free-robux-working_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/coin-master-spin-link_GM406889139.pdf
    • http://lib.fekon.untad.ac.id/repository/how-to-get-free-robux-promo-codes_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/coin-master-free-spins-cheat_GM406889139.pdf
    • http://lib.fekon.untad.ac.id/repository/roblox-april-fools-hack_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/minecraft-survival-hacks_GM479516143.pdf
    • http://lib.fekon.untad.ac.id/repository/free-spins-coin-master-hack-2021_GM406889139.pdf
    • http://lib.fekon.untad.ac.id/repository/coin-master-free-spin-and-coin-link-app_GM406889139.pdf
    • http://lib.fekon.untad.ac.id/repository/coin-master-free-spins-without-human-verification_GM406889139.pdf
    • http://lib.fekon.untad.ac.id/repository/robux-games_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/free-coin-master-hack-no-verification_GM406889139.pdf
    • http://lib.fekon.untad.ac.id/repository/how-to-get-free-robux-on-mobile_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/bit-ly-coin-master-hack_GM406889139.pdf
    • http://lib.fekon.untad.ac.id/repository/coin-spin-link_GM406889139.pdf
    • http://lib.fekon.untad.ac.id/repository/free-robux-2021-no-verification_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/pokemon-go-free-daily-remote-pass_GM1094591345.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004be9.bin
26bfe766ca9f4209c89b990228df3efe5177deedfa91e8cf281dc560fd0b21c7		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BE9 24364 bytes
font_01_sfnt_off00008316.bin
ea6dcb3ab890178a05547e3161835c8edeffae3732ad32b35eba99407f3e1bd5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8316 17872 bytes

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