Malicious PDF — malware analysis report

Static analysis result for SHA-256 3640b355ebca0d84…

MALICIOUS

PDF

42.5 KB Created: 2021-05-13 10:33:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: b2a6a0b881e6d553da5b799adfcaf7a7 SHA-1: 03b618ae058eb4e61aa8a3a7498a937fc8b42d6c SHA-256: 3640b355ebca0d84938a5e48885fbe996fffe0f8f9fb29c9f38a1cbf72123526
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and game hack lures, such as '60 Free Spins Coin Master Game Hack'. The document body and embedded URLs strongly suggest a phishing or scam attempt designed to entice users to click through to potentially malicious sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/406889139/60-free-spins-coin-master-game-hack In PDF document text
    • http://kpu-denpasarkota.go.id/new/public/ckfinder/userfiles/files/rbx-place-free-robux_GM431946152.pdfIn PDF document text
    • http://kpu-denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://kpu-denpasarkota.go.id/new/public/ckfinder/userfiles/files/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://kpu-denpasarkota.go.id/new/public/ckfinder/userfiles/files/card-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://kpu-denpasarkota.go.id/new/public/ckfinder/userfiles/files/worst-client_GM479516143.pdfIn PDF document text
    • http://kpu-denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://kpu-denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-spin-links-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://kpu-denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://kpu-denpasarkota.go.id/new/public/ckfinder/userfiles/files/universal-minecraft-converter-free_GM479516143.pdfIn PDF document text
    • http://kpu-denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-game-free-spin-download_GM406889139.pdfIn PDF document text
    • http://kpu-denpasarkota.go.id/new/public/ckfinder/userfiles/files/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://kpu-denpasarkota.go.id/new/public/ckfinder/userfiles/files/minecraft-auto-miner-hack_GM479516143.pdfIn PDF document text
    • http://kpu-denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-daily-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://kpu-denpasarkota.go.id/new/public/ckfinder/userfiles/files/hack-coin-master-game-apk_GM406889139.pdfIn PDF document text
    • http://kpu-denpasarkota.go.id/new/public/ckfinder/userfiles/files/archery-master-3d-hack-unlimited-coins-cheats_GM406889139.pdfIn PDF document text
    • http://kpu-denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spin-and-trading-group_GM406889139.pdfIn PDF document text
    • http://kpu-denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://kpu-denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • http://kpu-denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • http://kpu-denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004af4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AF4 25048 bytes
SHA-256: df3b72afe918df21c8350f3565f72bc93ed3c338fb0f9a9c43769d6e1ac67689
font_01_sfnt_off000083fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83FC 18224 bytes
SHA-256: c1ecca62003467cdf8c5fbac224d7e39febf20c3e1f0cb28698ef381036d4826

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