Malicious PDF — malware analysis report

Static analysis result for SHA-256 71d3051773087f55…

MALICIOUS

PDF

33.3 KB Created: 2021-07-09 11:27:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 618c4488bad28bb70a25fd1cf45943b9 SHA-1: 04e24281563d611270370f896ca03975bf10f1f7 SHA-256: 71d3051773087f55698f37a9fe4f74ff6ef6f60e52b6fb8060f85d2b08369d22
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 0.9980

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/479516143/free-minecraft-printables-game-hack PDF link annotation
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/carding-for-pubg-uc_GM1330123889.pdfIn PDF document text
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/robux-hack-me_GM431946152.pdfIn PDF document text
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-codes-real_GM431946152.pdfIn PDF document text
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/flip-master-free-coins_GM406889139.pdfIn PDF document text
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-hack-mega-download_GM431946152.pdfIn PDF document text
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/minecraft-games-to-play-for-free_GM479516143.pdfIn PDF document text
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-make-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-spin-and-win-coin-master_GM406889139.pdfIn PDF document text
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-use-scripts-in-roblox-hack_GM431946152.pdfIn PDF document text
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-hack-app_GM431946152.pdfIn PDF document text
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-link-whatsapp-group_GM406889139.pdfIn PDF document text
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-money-hack_GM431946152.pdfIn PDF document text
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-com-2021_GM431946152.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_off00003121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3121 21424 bytes
SHA-256: c9996383003a200a0c119c582d6232052d1f4223a48e5fa80532bea09eeb6ab3
font_01_sfnt_off00005fb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB4 18240 bytes
SHA-256: 88c1583924e4df7bbca9c9847ac4d52f5c04679015d4c663ed573c82f3a7ef36

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