Malicious PDF — malware analysis report

Static analysis result for SHA-256 24a53387948299f4…

MALICIOUS

PDF

34.8 KB Created: 2021-07-05 04:12:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 3d52d0fac7c2cf91a7bd5002bdb88280 SHA-1: 3f942ad19e41171c3782abdf9c7a381c16dd3c3b SHA-256: 24a53387948299f449d9008f9353cbec3ab57846b718ceab0c6b60f8fdbc4500
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many of which are SEO-optimized slugs pointing to sites offering free in-game currency or accounts for popular games. The ML classifier and PDF link farm heuristics strongly indicate malicious intent, likely to direct users to phishing sites or download malware. The presence of a 'download button' lure further supports this malicious workflow.

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/free-pet-food-coin-master-game-hack
    • http://library.fikes.upnvj.ac.id/repository/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdf
    • http://library.fikes.upnvj.ac.id/repository/free-black-hole-pack-roblox_GM431946152.pdf
    • http://library.fikes.upnvj.ac.id/repository/free-robux-no-verification-at-all_GM431946152.pdf
    • http://library.fikes.upnvj.ac.id/repository/free-robux-com-no-verification_GM431946152.pdf
    • http://library.fikes.upnvj.ac.id/repository/free-pet-food-coin-master_GM406889139.pdf
    • http://library.fikes.upnvj.ac.id/repository/free-minecraft-servers-to-join_GM479516143.pdf
    • http://library.fikes.upnvj.ac.id/repository/hack-roblox-computer_GM431946152.pdf
    • http://library.fikes.upnvj.ac.id/repository/free-minecraft-printables-food-labels_GM479516143.pdf
    • http://library.fikes.upnvj.ac.id/repository/coin-master-free-coins-and-spins-2021_GM406889139.pdf
    • http://library.fikes.upnvj.ac.id/repository/roblox-promo-codes-2021-free_GM431946152.pdf
    • http://library.fikes.upnvj.ac.id/repository/roblox-avatar-free_GM431946152.pdf
    • http://library.fikes.upnvj.ac.id/repository/tous-les-script-roblox-cheat_GM431946152.pdf
    • http://library.fikes.upnvj.ac.id/repository/coin-master-hack-tool-2021_GM406889139.pdf
    • http://library.fikes.upnvj.ac.id/repository/coin-master-hack-without-verification_GM406889139.pdf
    • http://library.fikes.upnvj.ac.id/repository/robux-hack-generator_GM431946152.pdf
    • http://library.fikes.upnvj.ac.id/repository/hack-roblox-jailbreak-2021_GM431946152.pdf
    • http://library.fikes.upnvj.ac.id/repository/free-spins-for-coin-master-hack_GM406889139.pdf
    • http://library.fikes.upnvj.ac.id/repository/how-to-get-free-likes-on-tiktok_GM835599320.pdf
    • http://library.fikes.upnvj.ac.id/repository/can-i-play-roblox-for-free_GM431946152.pdf
    • http://library.fikes.upnvj.ac.id/repository/coin-master-redeem-code-free_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003044.bin
f94552f36945712c60891118e8e278c983d2044f61e97539ec810676b9f19764		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3044 23308 bytes
font_01_sfnt_off00006520.bin
a7c92b5cd33abe01afb42c60a8dc822ff1d4f8d31c8a3da7d6ded022ad377780		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6520 18324 bytes

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