Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfe1de22da044836…

MALICIOUS

PDF

34.6 KB Created: 2021-06-18 14:56:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ce6113c5fc13ae00b0056efe4358cc6f SHA-1: 67260c78db8ceab6d0c8fb083a90e5750e6f46f4 SHA-256: dfe1de22da0448363b817f67d1a57dcc0c9de54e42863151d774d62367bf0a41
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded URLs, many of which are disguised as generators or hacks for popular games and services, indicating a lure for potentially unwanted or malicious downloads. The ML classifier also flagged this PDF as malicious with a high confidence score. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites, likely for malware distribution or phishing.

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/instant-free-robux-generator-game-hack PDF link annotation
    • http://dismarinamt.com.br/images/how-to-download-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • http://dismarinamt.com.br/images/free-robux-hack-on-phone-no-human-verification_GM431946152.pdfIn PDF document text
    • http://dismarinamt.com.br/images/get-tiktok-followers-free_GM835599320.pdfIn PDF document text
    • http://dismarinamt.com.br/images/coin-master-ios-hack_GM406889139.pdfIn PDF document text
    • http://dismarinamt.com.br/images/cool-avatars-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://dismarinamt.com.br/images/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://dismarinamt.com.br/images/synapse-roblox-exploit-download-free_GM431946152.pdfIn PDF document text
    • http://dismarinamt.com.br/images/how-to-get-free-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • http://dismarinamt.com.br/images/earn-free-robux_GM431946152.pdfIn PDF document text
    • http://dismarinamt.com.br/images/hack-game-plus-com-coin-master_GM406889139.pdfIn PDF document text
    • http://dismarinamt.com.br/images/roblox-rewards-robux_GM431946152.pdfIn PDF document text
    • http://dismarinamt.com.br/images/free-tiktok-followers_GM835599320.pdfIn PDF document text
    • http://dismarinamt.com.br/images/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://dismarinamt.com.br/images/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://dismarinamt.com.br/images/free-builders-club-accounts-on-roblox_GM431946152.pdfIn PDF document text
    • http://dismarinamt.com.br/images/minecraft-free-apk_GM479516143.pdfIn PDF document text
    • http://dismarinamt.com.br/images/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://dismarinamt.com.br/images/how-to-change-your-username-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://dismarinamt.com.br/images/how-many-levels-are-in-coin-master_GM406889139.pdfIn PDF document text
    • http://dismarinamt.com.br/images/free-spin-link-for-coin-master-game_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_off00003060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3060 22900 bytes
SHA-256: cac4808ee7fea65ddf945caf3bd5f44ecf868708f5a0e15064917182580a30a7
font_01_sfnt_off00006380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6380 18636 bytes
SHA-256: a76c6e4109d0f5fed9c694958a74df3b9e0188c4ecc341983b07dda8ca44ddb5

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