Malicious PDF — malware analysis report

Static analysis result for SHA-256 041d252f1546c707…

MALICIOUS

PDF

35.9 KB Created: 2021-07-05 07:18:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: ed505b2d503b6309db7ca2e69cdea338 SHA-1: b9f0bd839e32550a93385a851a67c18f3e9c0f54 SHA-256: 041d252f1546c707aad271574b48226b2be01ee7145b9d38065bdd7d0302dabc
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and heuristics indicating it is designed to lure users with promises of game hacks and generators. The primary URL, http://netcdn.tw/app/431946152/inappropriate-roblox-games-game-hack, is likely a redirector to a malicious site. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to download or redirect to a malicious payload, aligning with a spearphishing attachment tactic.

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/inappropriate-roblox-games-game-hack PDF link annotation
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/pubg-uc-vpn-apk_GM1330123889.pdfIn PDF document text
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/minecraft-apk-free-download-016-0_GM479516143.pdfIn PDF document text
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/pastebin-free-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/how-to-hack-roblox-murder-15_GM431946152.pdfIn PDF document text
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/how-to-hack-someone-address-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/free-online-games-like-minecraft_GM479516143.pdfIn PDF document text
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-2021-apk_GM406889139.pdfIn PDF document text
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/coin-master-hack-ios-12_GM406889139.pdfIn PDF document text
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/free-robux-download_GM431946152.pdfIn PDF document text
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/hack-game-roblox-apk_GM431946152.pdfIn PDF document text
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/hack-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/roblox-robux_GM431946152.pdfIn PDF document text
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/hack-rc7-roblox-download_GM431946152.pdfIn PDF document text
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/hack-robux_GM431946152.pdfIn PDF document text
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/mcpe-master-coin-hack-apk_GM406889139.pdfIn PDF document text
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/free-roblox-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-link-today-hack_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_off000032aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32AA 23152 bytes
SHA-256: 74300a3cf3f77d724730ac3162757b040630ce0ed3a371e91db09ccdc7261dad
font_01_sfnt_off000066e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66E1 19144 bytes
SHA-256: 79a6a5a9ae6257ea638799cb32a861e3301f0777c40791eec12f5a449b6bff8a

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