Malicious PDF — malware analysis report

Static analysis result for SHA-256 0425a42d45f5e2fd…

MALICIOUS

PDF

32.1 KB Created: 2021-06-19 09:42:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 16d9970459d923ff605bbef467460f43 SHA-1: 8817c3d14568ccc64a41d5e86292bef9cb595138 SHA-256: 0425a42d45f5e2fd59dc547dbae53579db5fc4b1e81468c3b7dfd82efc014c9b
102 Risk Score

Malware Insights

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

This PDF document contains numerous links to external websites, many of which are structured as SEO link farms. The primary URL, http://netcdn.co/app/431946152/robux-hack-my-rekoff-game-hack, along with others, suggests a lure for users seeking game cheats or currency. The presence of a "download button" heuristic further supports the intent to trick users into downloading potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/robux-hack-my-rekoff-game-hack PDF link annotation
    • https://opac.umrah.ac.id/repository/pastebin-roblox-account-hack-2021_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-money-codes-for-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-codes-not-used-2021_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-apk-mod_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/rc7-roblox-download-free-mac_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/bux-gg-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-free-spins-moonactive_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-get-free-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-attacks-on-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/where-to-get-free-clothes-on-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-roblox-yolasite_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-spin-coin_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-admin-hacks-2021_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-hack-tool-v1-9_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/mobihack-net-roblox-hack_GM431946152.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_off000028ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28ED 21552 bytes
SHA-256: 3f516d5261856bcbc5cac0bbe1fbd209e52f5452f53adc2e9486b76f63b5c1e3
font_01_sfnt_off0000585f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x585F 19100 bytes
SHA-256: 8cfef59fff1e73988bf04712b76ffd25521aadef44a875d52e043f1af2fda213

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