Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfce2bcd059cf6fc…

MALICIOUS

PDF

48.9 KB Created: 2021-06-03 13:38:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 40e0671cfbc2af9b34a64e6f201bc1ed SHA-1: 85dd262d9b3d47d9a16c65824fdfedb838235fe6 SHA-256: bfce2bcd059cf6fc3004d607c7b32e80cb88475f010c2367488f8027a0114149
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many of which are part of a link farm designed to appear as legitimate resources for free in-game items. The primary URL, https://netcdn.online/app/431946152/roblox-pink-free-robux-game-hack, suggests a lure for game-related cheats or hacks. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, and the ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is intended to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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 https://netcdn.online/app/431946152/roblox-pink-free-robux-game-hack PDF link annotation
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/coin-master-heaven-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-free-coins-today_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/tiktok-free-images_GM835599320.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/coin-master-70-spin-link-today_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-3533-android-hack_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/free-coins-for-planet-master-game_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/free-roblox-groups_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/roblox-rewards_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/minecraft-gun-mod-download-free_GM479516143.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/daily-free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/hacked-client-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/hack-coin-master-apk-32-download_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/claim-free-robux_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_off00005b7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B7D 27996 bytes
SHA-256: e326ff54fd9e9d2aceb0d937ecd069cd9868fcdb027468c4c2bebcfa117af11b
font_01_sfnt_off00009c50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C50 18532 bytes
SHA-256: 62e9169d40109a3abf4bdf842601a34c83c90693a7fee2a3f682a11a81f7ba3a

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