Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a9a4d95fe5aed5f…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 21:10:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ae32b7f75d136e12ef7e0011770effe7 SHA-1: 870d862bd6a51004ed54999599b8e686ed1667b7 SHA-256: 5a9a4d95fe5aed5f25b2df6412535dd335d9740fe3efd7def05b594bedcc63d6
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded URLs, many of which are part of a link farm designed to direct users to pages offering game hacks and cheats. The presence of a "download button" heuristic and the ML classifier's high confidence score indicate a malicious intent to trick users into visiting these external sites. No scripts were extracted, but the overall structure suggests a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/coinmaster-game-hack
    • https://stikes-alinsyirah.ac.id/perpustakaan/repository/easy-free-robux-game_GM431946152.pdf
    • https://stikes-alinsyirah.ac.id/perpustakaan/repository/how-to-hack-on-roblox-into-accounts_GM431946152.pdf
    • https://stikes-alinsyirah.ac.id/perpustakaan/repository/how-do-you-get-free-robux-2021_GM431946152.pdf
    • https://stikes-alinsyirah.ac.id/perpustakaan/repository/coin-master-links-for-free-spins-2021_GM406889139.pdf
    • https://stikes-alinsyirah.ac.id/perpustakaan/repository/como-tener-dinero-infinito-en-meepcity-roblox-2021-hack_GM431946152.pdf
    • https://stikes-alinsyirah.ac.id/perpustakaan/repository/get-free-spins-coin-master-2021_GM406889139.pdf
    • https://stikes-alinsyirah.ac.id/perpustakaan/repository/how-to-hack-in-not-so-bizarre-adventure-roblox_GM431946152.pdf
    • https://stikes-alinsyirah.ac.id/perpustakaan/repository/roblox-lawsuit_GM431946152.pdf
    • https://stikes-alinsyirah.ac.id/perpustakaan/repository/free-robux-hack-generator-club-no-survey_GM431946152.pdf
    • https://stikes-alinsyirah.ac.id/perpustakaan/repository/coin-master-links-to-get-free-spins_GM406889139.pdf
    • https://stikes-alinsyirah.ac.id/perpustakaan/repository/roblox-executor-download-virus-free-download_GM431946152.pdf
    • https://stikes-alinsyirah.ac.id/perpustakaan/repository/roblox-buy-for-free_GM431946152.pdf
    • https://stikes-alinsyirah.ac.id/perpustakaan/repository/roblox-how-to-hack-roblox-accounts_GM431946152.pdf
    • https://stikes-alinsyirah.ac.id/perpustakaan/repository/free-robux-jezz-tec_GM431946152.pdf
    • https://stikes-alinsyirah.ac.id/perpustakaan/repository/coin-master-hack-apk-with-fb-login-2021_GM406889139.pdf
    • https://stikes-alinsyirah.ac.id/perpustakaan/repository/free-robux-co_GM431946152.pdf
    • https://stikes-alinsyirah.ac.id/perpustakaan/repository/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdf
    • https://stikes-alinsyirah.ac.id/perpustakaan/repository/how-to-hack-roblox-accounts-mac_GM431946152.pdf
    • https://stikes-alinsyirah.ac.id/perpustakaan/repository/free-coin-master-spins-2021_GM406889139.pdf
    • https://stikes-alinsyirah.ac.id/perpustakaan/repository/roblox-counter-blox-cheats-crash_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000031e6.bin
a88276baa4d13331b593a7fbea15e2cfa8a8bf16f90244c284cb193d1a488f6e		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31E6 22968 bytes
font_01_sfnt_off00006566.bin
aeec47090e2d397d52e6994ac52fcd26f4fdd646fe6594f845e9ca54af877ae9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6566 18092 bytes

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