Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f1161c07a40c253…

MALICIOUS

PDF

34.2 KB Created: 2021-06-27 00:12:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3153b8ebf7575666609d4d7d407ada4a SHA-1: 8538eeff7b9154505ff88d304e5cfe1e0aaae63a SHA-256: 3f1161c07a40c253fd8a6d24fb9a48b3d42ee102f6d885cf52a26e1ed7df0c2c
102 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, many of which are presented as 'free' game currency or hacks, indicating a lure for users to download potentially unwanted or malicious software. The ML classifier strongly supports the malicious nature of this PDF, and the presence of a download button heuristic further reinforces the deceptive intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/479516143/minecraft-java-edition-free-trial-game-hack PDF link annotation
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/hackers-on-roblox-that-will-give-me-free-robux_GM431946152.pdfIn PDF document text
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/robux-hack-tools_GM431946152.pdfIn PDF document text
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spin-and-coin-link-today_GM406889139.pdfIn PDF document text
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/best-site-for-free-coin-master_GM406889139.pdfIn PDF document text
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/arsenal-roblox-cheats_GM431946152.pdfIn PDF document text
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-app-ios-download_GM406889139.pdfIn PDF document text
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-cards_GM406889139.pdfIn PDF document text
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/windows-10-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-minecraft-addons_GM479516143.pdfIn PDF document text
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-trolling_GM431946152.pdfIn PDF document text
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-gold-cards-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-apk-download-latest-version_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_off000032f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32F5 21728 bytes
SHA-256: 6a8ffb0a7fd89dc1100d6e15d3f0857706b8a1acda49c0cc6a556f357efd721e
font_01_sfnt_off0000625e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x625E 18524 bytes
SHA-256: d4a994fd7502902f1ccb0c5c51989318f5cd97a3a708631542142bcef13529e5

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