Malicious PDF — malware analysis report

Static analysis result for SHA-256 a670614fa86107e3…

MALICIOUS

PDF

34.3 KB Created: 2021-07-04 01:10:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: e395096fd57caa279d5e007a2154612e SHA-1: 3104815eab76c6de8bed0b5e8061d578c4689ef4 SHA-256: a670614fa86107e3cde0142977b2ed47ae62aec32c9e3bbabcfdeef541a1a404
102 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are structured as SEO link farms for game cheats and hacks. The document body explicitly mentions "Best Hacked Client" and includes URLs that lead to other PDF files, suggesting a lure to download potentially malicious content. The ML classifier also strongly indicated maliciousness.

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.tw/app/479516143/best-hacked-client-game-hack PDF link annotation
    • http://petrorang.com/admin-panel/products/images/files/toolbox-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/wie-bekommt-man-hacks-in-roblox_GM431946152.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/play-free-games-online-without-downloading-roblox_GM431946152.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/free-robux-hack-us-no-human-verification_GM431946152.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/coin-master-card-collection-hack-apk_GM406889139.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/do-you-want-free-robux-get-unlimited-robux-for-free_GM431946152.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/minecraft-apk-free-download-016-0_GM479516143.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/stock-speed-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/20210-robux_GM431946152.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/inspect-element-hacks-for-roblox_GM431946152.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/how-to-get-free-faces-on-roblox_GM431946152.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/how-to-make-your-own-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/coin-master-game-hack_GM406889139.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/free-tiktok-fans-without-verification_GM835599320.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_off00003292.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3292 21920 bytes
SHA-256: 9298b64cb2608a2ae9098a6235be1eea5e7557f55f52a1b824a6fd3319ea4551
font_01_sfnt_off000062be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62BE 18492 bytes
SHA-256: 903a763f7ab233d5cbfd476072903032bf39c0f6a32515afc0c758fc5aff1474

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