Malicious PDF — malware analysis report

Static analysis result for SHA-256 85352ac91a3580c1…

MALICIOUS

PDF

35.0 KB Created: 2021-07-09 17:10:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 918ec6d968cc75ad87b3518baef4431b SHA-1: 549faee16fa0c690a6cb088518dcc41dbe3d2cd1 SHA-256: 85352ac91a3580c15b8ab228cf5d66d91f8d5cd5dbffdd068e5368f110459f71
82 Risk Score

Malware Insights

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

The PDF contains multiple links to websites offering game hacks and free in-game currency, specifically targeting popular games like Roblox. The primary link, http://netcdn.tw/app/431946152/roblox-com-free-robux-game-hack, is flagged as a game hack redirector, indicating a likely phishing or malware distribution attempt. The document body and heuristics strongly suggest a lure to trick users into visiting these malicious sites.

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/431946152/roblox-com-free-robux-game-hack PDF link annotation
    • https://gobeepbeep.co.uk/media/storage/editor/files/free-robux-co_GM431946152.pdfIn PDF document text
    • https://gobeepbeep.co.uk/media/storage/editor/files/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • https://gobeepbeep.co.uk/media/storage/editor/files/survivor-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://gobeepbeep.co.uk/media/storage/editor/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://gobeepbeep.co.uk/media/storage/editor/files/coin-master-hack-ios-without-verification_GM406889139.pdfIn PDF document text
    • https://gobeepbeep.co.uk/media/storage/editor/files/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • https://gobeepbeep.co.uk/media/storage/editor/files/roblox-hack-com_GM431946152.pdfIn PDF document text
    • https://gobeepbeep.co.uk/media/storage/editor/files/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • https://gobeepbeep.co.uk/media/storage/editor/files/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • https://gobeepbeep.co.uk/media/storage/editor/files/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdfIn PDF document text
    • https://gobeepbeep.co.uk/media/storage/editor/files/how-to-send-proof-of-hacker-on-roblox_GM431946152.pdfIn PDF document text
    • https://gobeepbeep.co.uk/media/storage/editor/files/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • https://gobeepbeep.co.uk/media/storage/editor/files/can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://gobeepbeep.co.uk/media/storage/editor/files/free-links-for-free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://gobeepbeep.co.uk/media/storage/editor/files/coin-master-hack-mod-apk-download_GM406889139.pdfIn PDF document text
    • https://gobeepbeep.co.uk/media/storage/editor/files/hack-roblox-free-builders-club_GM431946152.pdfIn PDF document text
    • https://gobeepbeep.co.uk/media/storage/editor/files/minecraft-mobile-free_GM479516143.pdfIn PDF document text
    • https://gobeepbeep.co.uk/media/storage/editor/files/robuxian-com-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://gobeepbeep.co.uk/media/storage/editor/files/roblox-online-game-free-no-download_GM431946152.pdfIn PDF document text
    • https://gobeepbeep.co.uk/media/storage/editor/files/coin-master-game-hunter_GM406889139.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_off000030ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30BA 22844 bytes
SHA-256: a9cd49050d3631a87e1dcc2072dcca5b4d0ce25c7e2621ab514b64cc51ebdea6
font_01_sfnt_off000063cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63CC 19052 bytes
SHA-256: c7437b3e7bd48948350c0c34152667cbccbfce8be2367ca38aabcff84c85cc8a

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