Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdb1d025a64e3b9a…

MALICIOUS

PDF

34.7 KB Created: 2021-06-20 02:59:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 58970e8b7753de35d22b5f2824003b95 SHA-1: 632a5a7d2acad85d674732bfd3659a69666c526e SHA-256: fdb1d025a64e3b9a262af34b3449d4221b9659afd959e243ac947c90a8bc54c6
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a document body that explicitly advertises 'Free Robux Generator' and 'Coin Master Hack', indicating a lure for users to click on links. The PDF_SEO_LINK_FARM heuristic firing suggests the document is part of a larger network of linked PDFs designed to drive traffic to malicious sites. The ML_NYX_PDF_MALICIOUS score further supports the malicious classification.

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/431946152/free-robux-generator-no-survey-or-email-game-hack
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-money-hack_GM431946152.pdf
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/reddit-coin-master-free-spins_GM406889139.pdf
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/get-roblox-for-free_GM431946152.pdf
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-no-survey-2021_GM406889139.pdf
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-speed-hack-feb_GM431946152.pdf
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/links-to-get-free-coins-in-coin-master_GM406889139.pdf
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-pokemon-brick-bronze-how-to-get-free-pokemon_GM431946152.pdf
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-no-human-verification-or-survey_GM431946152.pdf
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-that-actually-works_GM406889139.pdf
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-hack-site_GM431946152.pdf
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-spins-coin-master-android_GM406889139.pdf
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-generator-no-verification_GM431946152.pdf
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-free-cards-link-2021_GM406889139.pdf
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-plates-of-fate-hack_GM431946152.pdf
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-hack-no-human-verification_GM406889139.pdf
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-hack-roblox-2021_GM431946152.pdf
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-make-a-free-minecraft-account_GM479516143.pdf
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-links-free-spins_GM406889139.pdf
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-make-a-roblox-group-for-free_GM431946152.pdf
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-without-human-verification-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000030c9.bin
54bce2f52cb1565482502886885f05960bd133f0aacf34aef19d1faef5bf03fa		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30C9 21804 bytes
font_01_sfnt_off0000614a.bin
93353e35a10f110a8d3ba1d78632329ae99a1911774b11075ae246fb94b22eb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x614A 19568 bytes

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