Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdaa7850f5abd6f0…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 21:35:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 845c6993569d0b99b9636f2e7e15a98b SHA-1: 3bd65cc4fa86140ccd4c2a6661f07cfec1fdcf98 SHA-256: fdaa7850f5abd6f0e3309cbf979306b5d76f31e0cae96b1fb923783a74a3d9ce
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links, including a prominent one to 'netcdn.tw', which is flagged as a game hack lure. The document body and heuristics indicate a social engineering tactic to trick users into visiting potentially malicious sites for game cheats or currency. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it functions as a dropper or redirector to a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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/coin-master-free-spin-daily-link-game-hack PDF link annotation
    • http://perpus.iainkediri.ac.id/pasca/repository/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/robloxain-roblox-hacks-robux_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/how-to-get-a-free-group-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/trigon-best-free-roblox-exploit_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/new-hack-for-roblox-2021-december-download-mediafire_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/roblox-play-now-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/cch-hack-m-pin-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/roblox-robux-giver-tool-hack-tool-download_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/cheat-roblox-tampermonkey_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/pokemon-go-free-accounts-list_GM1094591345.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/cheat-codes-for-roblox-retail-tycoon_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/tiktok-like-bot-free_GM835599320.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/free-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/how-to-get-free-characters-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/how-to-get-easy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/free-robux-no-downloads-2021_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/roblox-player-exe-free_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/free-group-payouts-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/is-minecraft-free-on-pc_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000031c3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31C3 22248 bytes
SHA-256: 4e248b9c4c3a3f4effa773353642c6541c598ddbafcdbe968da32a49829d36ba
font_01_sfnt_off0000636a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x636A 18768 bytes
SHA-256: 9fefbb771085525faa6b6b1c9c948570a810338fb9e41354c9418806dfb9931a

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