Malicious PDF — malware analysis report

Static analysis result for SHA-256 7262e6d0f8ba8c57…

MALICIOUS

PDF

36.0 KB Created: 2021-07-05 20:33:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 40c9098d3a9856e4521e318f82db7027 SHA-1: 7262d19966229f21561042f3badcfa81d0be4391 SHA-256: 7262e6d0f8ba8c57521cc42687a564c0396fee64cfeee714616d547ccd8d0c82
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which point to resources promising free in-game currency for popular games. The ML classifier strongly indicated maliciousness, and the presence of numerous SEO-optimized links suggests a campaign to drive traffic to potentially malicious download sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution attempt.

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/431946152/www-roblox-com-free-robux-game-hack
    • https://perpus.uwhs.ac.id/repository/apps-to-get-free-robux_GM431946152.pdf
    • https://perpus.uwhs.ac.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdf
    • https://perpus.uwhs.ac.id/repository/free-robux-brick-bronze_GM431946152.pdf
    • https://perpus.uwhs.ac.id/repository/how-to-hack-peoples-account-on-roblox-2021_GM431946152.pdf
    • https://perpus.uwhs.ac.id/repository/free-robux-generator-without-survey_GM431946152.pdf
    • https://perpus.uwhs.ac.id/repository/emirtus-hack-roblox_GM431946152.pdf
    • https://perpus.uwhs.ac.id/repository/coin-master-free-spin-and-coin-links_GM406889139.pdf
    • https://perpus.uwhs.ac.id/repository/roblox-cheat-codes-for-dragon-ball-z-rage-2021-november_GM431946152.pdf
    • https://perpus.uwhs.ac.id/repository/roblox-game-that-gives-you-free-robux_GM431946152.pdf
    • https://perpus.uwhs.ac.id/repository/free-tiktok-followers-app_GM835599320.pdf
    • https://perpus.uwhs.ac.id/repository/free-spin-coin-master-ios_GM406889139.pdf
    • https://perpus.uwhs.ac.id/repository/roblox-how-to-get-free-pets_GM431946152.pdf
    • https://perpus.uwhs.ac.id/repository/is-there-actually-a-hack-to-get-free-robux_GM431946152.pdf
    • https://perpus.uwhs.ac.id/repository/bloxawards-free-robux_GM431946152.pdf
    • https://perpus.uwhs.ac.id/repository/flying-hacks-for-roblox-survivor_GM431946152.pdf
    • https://perpus.uwhs.ac.id/repository/free-roblox-no-hack_GM431946152.pdf
    • https://perpus.uwhs.ac.id/repository/roblox-hack-tool-no-survey_GM431946152.pdf
    • https://perpus.uwhs.ac.id/repository/robux-hack-2021-hack_GM431946152.pdf
    • https://perpus.uwhs.ac.id/repository/coin-master-free-spins-cheat_GM406889139.pdf
    • https://perpus.uwhs.ac.id/repository/ulgames-resources-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003557.bin
15bd80f4fd2476d4582afb3b11b983453e4b4ecd325ee99d62242a407d0365a0
pdf-font-stream PDF embedded font (sfnt) at offset 0x3557 22276 bytes
font_01_sfnt_off000066d9.bin
9f2d18035413ba33397c677b2581e7e69ab306c490ad5b1efc57e4a607bb5205
pdf-font-stream PDF embedded font (sfnt) at offset 0x66D9 19412 bytes