Malicious PDF — malware analysis report

Static analysis result for SHA-256 36e42ad682a0a6ee…

MALICIOUS

PDF

43.8 KB Created: 2021-04-23 07:47:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e4f0b71a5728e7bd85dd645a65d89403 SHA-1: 19ad81b426606e5c5ae473d739c1479d9843fe94 SHA-256: 36e42ad682a0a6ee16ff08d972ec2620dcf437063e00fed609a84e64fed52b2b
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9868

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://netsecure.pro/app/431946152/free-premium-accounts-roblox-game-hack PDF link annotation
    • http://www.kpu-gianyarkab.go.id/new/public/ckfinder/userfiles/files/roblox-dashing-simulator-hack-script-pastebin-2021.pdfIn PDF document text
    • http://www.kpu-gianyarkab.go.id/new/public/ckfinder/userfiles/files/free-robux-pastebin-2021.pdfIn PDF document text
    • http://www.kpu-gianyarkab.go.id/new/public/ckfinder/userfiles/files/hack-into-anyones-roblox-account-to-steal-their-robux.pdfIn PDF document text
    • http://www.kpu-gianyarkab.go.id/new/public/ckfinder/userfiles/files/bundle-roblox-free.pdfIn PDF document text
    • http://www.kpu-gianyarkab.go.id/new/public/ckfinder/userfiles/files/roblox-adopt-me-hack-script-pastebin.pdfIn PDF document text
    • http://www.kpu-gianyarkab.go.id/new/public/ckfinder/userfiles/files/roblox-free-boombox-games.pdfIn PDF document text
    • http://www.kpu-gianyarkab.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-no-hack-2021.pdfIn PDF document text
    • http://www.kpu-gianyarkab.go.id/new/public/ckfinder/userfiles/files/roblox-hack-unlimited.pdfIn PDF document text
    • http://www.kpu-gianyarkab.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-on-roblox-pc-2021.pdfIn PDF document text
    • http://www.kpu-gianyarkab.go.id/new/public/ckfinder/userfiles/files/adds-that-give-you-free-robux.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_off000043ed.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x43ED 25168 bytes
SHA-256: 1d2d4f50907eecef0e618a150180aa7334acc42af803d806ab86ad8765e45c68
font_01_sfnt_off00007e3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E3D 2848 bytes
SHA-256: 4737c2778a085e0cb49e73f3b054b1a71e3f40720d213b4bfda97f95a31bfbf1
font_02_sfnt_off000087fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87FE 18728 bytes
SHA-256: cfeca0888ad24fc68ecd86b78c7e851a8b3bbaf6fef8b5883325d619ed89f29d

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