Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac8b8a930929162a…

MALICIOUS

PDF

51.3 KB Created: 2021-05-13 13:04:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 6e199921aec38bae374b617b59e9d890 SHA-1: 11b3618ceb986cf87a15c3ba36010961718ae41b SHA-256: ac8b8a930929162a56f186dd16334382ce2525ab3663a629297f2d2bb130b19f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to 'free Robux' and game hacks to entice users to click on a link. The primary malicious URL identified is https://netcdn.xyz/app/431946152/free-robux-gift-card-codes-2021-game-hack, which is likely a redirector to a malicious payload or phishing page. The document's structure and embedded URLs suggest a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9348

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 https://netcdn.xyz/app/431946152/free-robux-gift-card-codes-2021-game-hack PDF link annotation
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/2021-no-human-verification-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-clothes-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/minecraft-xbox-one-edition-digital-code-free_GM479516143.pdfIn PDF document text
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/www-coin-master-hack-com_GM406889139.pdfIn PDF document text
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spin-software_GM406889139.pdfIn PDF document text
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/bux-free-robux_GM431946152.pdfIn PDF document text
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/free-minecraft-skin-packs_GM479516143.pdfIn PDF document text
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-link-hack_GM406889139.pdfIn PDF document text
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/free-robux-offers_GM431946152.pdfIn PDF document text
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/get-robux-now_GM431946152.pdfIn PDF document text
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/coin-master-official-website_GM406889139.pdfIn PDF document text
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-through-coin-pop_GM406889139.pdfIn PDF document text
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/free-robux-apk_GM431946152.pdfIn PDF document text
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-and-coins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/do-you-get-windows-10-minecraft-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00005130.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5130 30732 bytes
SHA-256: ef033e71ad1505a7d417018bb2e0b4d6e8a2bb7cd8d25bf789285c60ec62ff6c
font_01_sfnt_off00009757.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9757 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off0000a3ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA3FF 19044 bytes
SHA-256: a83203ba6d4d8e4db234da74518c811315008a13a6a61ff598d06d89853e7c2b

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