Malicious PDF — malware analysis report

Static analysis result for SHA-256 d60d710e4892722b…

MALICIOUS

PDF

35.0 KB Created: 2021-07-04 12:27:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b4bda819e9bc04801ad50aabaaf6c539 SHA-1: c8c4abbbb522df080e85d4aaa6855663c2386bba SHA-256: d60d710e4892722b52a8da05adcbbf848b060394179917ce2b542f0e6a13776c
102 Risk Score

Malware Insights

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

This PDF document contains numerous embedded URLs and a 'doc body' that explicitly mentions 'Microsoft Free Robux' and game-related hacks. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, many of which are structured as SEO-friendly article links, suggesting a tactic to attract users searching for cheats or free in-game currency. The primary URL, http://netcdn.tw/app/431946152/microsoft-free-robux-game-hack, likely serves as the initial lure or payload host.

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/microsoft-free-robux-game-hack PDF link annotation
    • http://chem.ipb.ac.id/kim/repository/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-app-hacks_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/minecraft-free-unblocked_GM479516143.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coinmaster-spin-ml-link_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-roblox-com_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-hack-version-ios_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-fan-hack_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-hack-apk-download-latest-version_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coinmaster-blogspot_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/how-to-get-free-robux-2021-codes_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/how-to-get-free-skins-in-roblox_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-hack-unlimited-spins-game-download_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-spins-on-coin-masters_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/get-me-robux-for-free_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_off00003198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3198 22464 bytes
SHA-256: eeaecb3e4772bf7e8fdc6203d0539abbaeddef95f359a7f38f2256403cb7a159
font_01_sfnt_off0000639e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x639E 19136 bytes
SHA-256: eceba35cd6627b8fd8c95b6fc578f752ad37bdbc88f79a1a211c8d87d48b0e2f

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