Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ea9523dca0efaeb…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 16:46:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 9c8deb1cde53fa20f331a5518703770a SHA-1: 101fb3d3a70a75cf4ce5e37cade7820f822ec518 SHA-256: 2ea9523dca0efaeb6f4678c898a1530f5d47bd5f7f88cd57cb69bf0647bd83b0
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to websites offering game hacks and generators, indicating a lure for users to visit potentially malicious sites. The heuristic 'PDF_SEO_LINK_FARM' suggests a large number of these links are designed for SEO manipulation, likely to attract unsuspecting users. The primary URL, http://netcdn.tw/app/406889139/coin-master-hack-root-game-hack, is directly associated with a 'game hack' lure, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • 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-hack-root-game-hack PDF link annotation
    • http://library.poltekkes-palangkaraya.ac.id/repository/free-roblox-card-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/how-to-make-a-minecraft-client_GM479516143.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/captain-underpants-roblox-free-game_GM431946152.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/how-to-hack-people-on-roblox-easy-2021_GM431946152.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/free-spin-links-coin-master-october-30-2021_GM406889139.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/free-level-7-executor-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/how-to-get-free-spins-on-coin-master-without-waiting_GM406889139.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/free-shirts-roblox-happydaved_GM431946152.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/coin-master-free-spin-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/voodygamescom-robloxhacks-5_GM431946152.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/free-robux-yummers_GM431946152.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/roblox-hack-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id//repository/2021-no-human-verification-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/generate-robux-for-free-without-downloading-games_GM431946152.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/descargar-hacks-para-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/free-instant-no-lie-robux_GM431946152.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/how-to-hack-admin-in-roblox-games_GM431946152.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/how-to-hack-knifes-in-assassin-roblox_GM431946152.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/how-to-get-shirts-on-roblox-for-free-no-bc_GM431946152.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
font_00_sfnt_off00003169.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3169 23228 bytes
SHA-256: 88cc1e086746713351b15a252500926a92149600f8e76975645aaf8a1d4d87c8
font_01_sfnt_off0000658c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x658C 18004 bytes
SHA-256: 88965cff14ae3d44805207439b4eea4fe5e6421e4cbbb00d66f0cdd29756971c

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