Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c5d8fee9979fbca…

MALICIOUS

PDF

34.1 KB Created: 2021-07-05 19:58:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 26382620ac616d11a1ee2dd00dba9cc9 SHA-1: cb48ead6df9e89073480e733745d0dcd91cd0bf7 SHA-256: 8c5d8fee9979fbca476b60cecc129fddf36288d68ed8fa84fd060fccd41f73f1
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many of which are part of a link farm designed to appear as legitimate resources for game-related content. The primary URL http://netcdn.tw/app/479516143/mcpe-game-hack, along with many others hosted on opac.salatiga.go.id, suggests an attempt to trick users into downloading malware disguised as game hacks or free accounts. The ML classifier strongly indicates malicious intent.

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/479516143/mcpe-game-hack
    • http://opac.salatiga.go.id/slims7/repository/roblox-cruise-ship-tyccon-albatros-free_GM431946152.pdf
    • http://opac.salatiga.go.id/slims7/repository/free-roblox-accounts-that-are-banned_GM431946152.pdf
    • http://opac.salatiga.go.id/slims7/repository/roblox-free-pants_GM431946152.pdf
    • http://opac.salatiga.go.id/slims7/repository/how-to-hack-someones-roblox-account-2021_GM431946152.pdf
    • http://opac.salatiga.go.id/slims7/repository/roblox-hack-murder-mystery-2_GM431946152.pdf
    • http://opac.salatiga.go.id/slims7/repository/how-to-make-anything-free-in-roblox_GM431946152.pdf
    • http://opac.salatiga.go.id/slims7/repository/how-to-hack-roblox-booga-booga-on-ipad_GM431946152.pdf
    • http://opac.salatiga.go.id/slims7/repository/how-to-get-free-robux-208-legit_GM431946152.pdf
    • http://opac.salatiga.go.id/slims7/repository/pastebin-free-roblox-accounts-2021_GM431946152.pdf
    • http://opac.salatiga.go.id/slims7/repository/coin-master-free-coins-link-blogspot_GM406889139.pdf
    • http://opac.salatiga.go.id/slims7/repository/free-youtube-shirt-roblox_GM431946152.pdf
    • http://opac.salatiga.go.id/slims7//repository/how-to-hack-roblox-for-robux_GM431946152.pdf
    • http://opac.salatiga.go.id/slims7/repository/http-blackgamesus-coinmasterhack_GM406889139.pdf
    • http://opac.salatiga.go.id/slims7/repository/roblox-how-to-hack-into-someones-account-2021_GM431946152.pdf
    • http://opac.salatiga.go.id/slims7/repository/free-roblox-accounts-with-robux-december-2021_GM431946152.pdf
    • http://opac.salatiga.go.id/slims7/repository/simple-game-hack-robux_GM431946152.pdf
    • http://opac.salatiga.go.id/slims7/repository/how-to-make-free-admin-in-roblox_GM431946152.pdf
    • http://opac.salatiga.go.id/slims7//repository/minecraft-pe-hacks_GM479516143.pdf
    • http://opac.salatiga.go.id/slims7/repository/how-to-get-free-robux-on-pc-2021-easy_GM431946152.pdf
    • http://opac.salatiga.go.id/slims7/repository/coin-master-hack-online-generator-without-human-verification_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031c3.bin
c3f50627849e6d520218cba05d06d9f96d72c48c022a545791279a04665a893f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x31C3 22564 bytes
font_01_sfnt_off0000642a.bin
bb08dbf34a52122f895504de6d0f043fb34325a43da687a59d3db3469e279ba9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x642A 17808 bytes

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