Malicious PDF — malware analysis report

Static analysis result for SHA-256 fddf03f20387b414…

MALICIOUS

PDF

34.3 KB Created: 2021-07-02 05:01:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b9ab31411d8a32a1ae85d2d1b2568c1c SHA-1: 8ac7fc75f3877e2f005a7bbc34408fa61a5cb48f SHA-256: fddf03f20387b414dbc97340568fbfc803ce0f320a4def246ace9bd8ee4fb322
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

This PDF document was generated by wkhtmltopdf and contains a large number of external links, many of which point to other PDFs. The primary URL http://netcdn.co/app/431946152/crop-tops-for-free-roblox-game-hack suggests a lure for free game items or hacks, likely leading to further malicious content or downloads. The ML classifier strongly indicated maliciousness, and the structure points to a link farm designed to distribute potentially harmful content.

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/crop-tops-for-free-roblox-game-hack PDF link annotation
    • https://kab-bangli.kpu.go.id/new/public/ckfinder/userfiles/files/how-do-i-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • https://kab-bangli.kpu.go.id/new/public/ckfinder/userfiles/files/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • https://kab-bangli.kpu.go.id/new/public/ckfinder/userfiles/files/free-gift-card-codes-roblox-2021_GM431946152.pdfIn PDF document text
    • https://kab-bangli.kpu.go.id/new/public/ckfinder/userfiles/files/hacks-for-dragon-ball-ultimate-roblox_GM431946152.pdfIn PDF document text
    • https://kab-bangli.kpu.go.id/new/public/ckfinder/userfiles/files/coin-master_GM406889139.pdfIn PDF document text
    • https://kab-bangli.kpu.go.id/new/public/ckfinder/userfiles/files/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • https://kab-bangli.kpu.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spin-redeem-code_GM406889139.pdfIn PDF document text
    • https://kab-bangli.kpu.go.id/new/public/ckfinder/userfiles/files/moonactive-free-spins-link_GM406889139.pdfIn PDF document text
    • https://kab-bangli.kpu.go.id/new/public/ckfinder/userfiles/files/robux-hack-me_GM431946152.pdfIn PDF document text
    • https://kab-bangli.kpu.go.id/new/public/ckfinder/userfiles/files/coin-master-free-coins-link-march-2021_GM406889139.pdfIn PDF document text
    • https://kab-bangli.kpu.go.id/new/public/ckfinder/userfiles/files/body-roblox_GM431946152.pdfIn PDF document text
    • https://kab-bangli.kpu.go.id/new/public/ckfinder/userfiles/files/como-hackear-coin-master-en-espaol_GM406889139.pdfIn PDF document text
    • https://kab-bangli.kpu.go.id/new/public/ckfinder/userfiles/files/free-spins-coin-master-2021-app_GM406889139.pdfIn PDF document text
    • https://kab-bangli.kpu.go.id/new/public/ckfinder/userfiles/files/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • https://kab-bangli.kpu.go.id/new/public/ckfinder/userfiles/files/happy-birthday-isabella-roblox-speed-hacks_GM431946152.pdfIn PDF document text
    • https://kab-bangli.kpu.go.id/new/public/ckfinder/userfiles/files/hacks-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • https://kab-bangli.kpu.go.id/new/public/ckfinder/userfiles/files/how-to-get-coin-master-free-spins-in-email_GM406889139.pdfIn PDF document text
    • https://kab-bangli.kpu.go.id/new/public/ckfinder/userfiles/files/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://kab-bangli.kpu.go.id/new/public/ckfinder/userfiles/files/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://kab-bangli.kpu.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-link_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_off000030c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30C3 22200 bytes
SHA-256: c6168d8eef1b58a03200400a8368e567b444d72efaa1d85e1383f951d1bc8433
font_01_sfnt_off000061c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61C2 18824 bytes
SHA-256: 7d17c8e0fd743ee06ff304aa7a43303b7603c4ad5c84d8f7eb07ba294fedb027

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