Malicious PDF — malware analysis report

Static analysis result for SHA-256 a24e304500e5b414…

MALICIOUS

PDF

34.4 KB Created: 2021-06-19 08:54:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: cedc2faa06fdb4cb188d24ca88dc0242 SHA-1: d48e85c4bb0d13ad6e6e86b5a201e18e4da4bb12 SHA-256: a24e304500e5b4146af3a20e45e062b9ae0b69847e4908bdcb6c6740dc0cde9d
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which are SEO-optimized and point to game-related cheats and hacks. The primary URL, http://netcdn.co/app/431946152/roblox-free-robux-super-heroes-game-hack, suggests a lure for free Robux, a common tactic for distributing malware or engaging in phishing. 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.co/app/431946152/roblox-free-robux-super-heroes-game-hack PDF link annotation
    • http://library.ulb.ac.id/repository/free-robux-generator-roblox-game_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-fb-free-spins-link_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/cool-roblox-free-outfits_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-hack-with-facebook-login_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/pokemon-go-hack-free-coins_GM1094591345.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-free-coins-cheat_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/bit-ly-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-get-gold-cards-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-groups-on-roblox-to-own_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/daily-spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/flood-escape-2-infinite-jump-roblox-hack-pastebin_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/code-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/mcpe-client_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/2021-hacks-for-robloxs-aimbot_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_off00002ee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EE5 22624 bytes
SHA-256: 6b0d8e72fe9cb7a026b882f5a686fd2a58b41d24b68ab02cce0afbaf16f4db26
font_01_sfnt_off00006180.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6180 18968 bytes
SHA-256: b8f7d09be299ae7c339e9f90e430a49d3346916284524dfe9fec180788ec6303

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