Malicious PDF — malware analysis report

Static analysis result for SHA-256 a205d602863fb787…

MALICIOUS

PDF

41.3 KB Created: 2021-05-19 13:09:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 7de31fdfdfda2eca9fb1043d04958067 SHA-1: 71908b7c63252edf733b7dfefcb1bd491afddffa SHA-256: a205d602863fb7870cddb2cc3c8432b126f787a9f2069c688478d9efd84b7a82
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many of which are presented as lures for free in-game currency or hacks. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to drive traffic to potentially malicious sites. The primary URL, 'https://netcdn.xyz/app/431946152/rbxoffers-earn-free-robux-game-hack', is a strong indicator of a scam or phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://netcdn.xyz/app/431946152/rbxoffers-earn-free-robux-game-hack PDF link annotation
    • https://bali.kpu.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-hats-on-roblox_GM431946152.pdfIn PDF document text
    • https://bali.kpu.go.id/new/public/ckfinder/userfiles/files/coin-master-2021_GM406889139.pdfIn PDF document text
    • https://bali.kpu.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-5-10-2021_GM406889139.pdfIn PDF document text
    • https://bali.kpu.go.id/new/public/ckfinder/userfiles/files/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • https://bali.kpu.go.id/new/public/ckfinder/userfiles/files/coin-master-gold-cards-hack_GM406889139.pdfIn PDF document text
    • https://bali.kpu.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-apk-no-fb-login_GM406889139.pdfIn PDF document text
    • https://bali.kpu.go.id/new/public/ckfinder/userfiles/files/how-many-levels-does-coin-master-have_GM406889139.pdfIn PDF document text
    • https://bali.kpu.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • https://bali.kpu.go.id/new/public/ckfinder/userfiles/files/coin-free-master_GM406889139.pdfIn PDF document text
    • https://bali.kpu.go.id/new/public/ckfinder/userfiles/files/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • https://bali.kpu.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://bali.kpu.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://bali.kpu.go.id/new/public/ckfinder/userfiles/files/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • https://bali.kpu.go.id/new/public/ckfinder/userfiles/files/free-robux-videos_GM431946152.pdfIn PDF document text
    • https://bali.kpu.go.id/new/public/ckfinder/userfiles/files/robux-link_GM431946152.pdfIn PDF document text
    • https://bali.kpu.go.id/new/public/ckfinder/userfiles/files/minecraft-online-free-download_GM479516143.pdfIn PDF document text
    • https://bali.kpu.go.id/new/public/ckfinder/userfiles/files/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://bali.kpu.go.id/new/public/ckfinder/userfiles/files/coin-master-claim-spins_GM406889139.pdfIn PDF document text
    • https://bali.kpu.go.id/new/public/ckfinder/userfiles/files/coin-master-links-that-don-t-expire_GM406889139.pdfIn PDF document text
    • https://bali.kpu.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-roblox-hair_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
stream_003_off00004626.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4626 24644 bytes
SHA-256: ff4537e4e12f51c0df55386491298817ff2b9e750f43f9f85053113ae21157d1
font_01_sfnt_off00007eea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EEA 18244 bytes
SHA-256: fa7b58e8bbd6048af1f0a6b5440a1dcdf7c9ae2c9f232fd911927377916bfdb1

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