Malicious PDF — malware analysis report

Static analysis result for SHA-256 78443cf47d341dc1…

MALICIOUS

PDF

34.6 KB Created: 2021-06-18 23:59:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 3d0806540c3a7eafed6dc9e19c4ea263 SHA-1: 4be4bf16b0b7f22919a381b86c4801f0e811e127 SHA-256: 78443cf47d341dc159c8a385c33613628016ebb99d1fdcd9a80fd1a141c70550
102 Risk Score

Malware Insights

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

The PDF document contains numerous links and a direct URL pointing to a purported 'free script executor for Roblox'. This suggests a lure to trick users into downloading potentially malicious software. The presence of a large number of SEO-optimized PDF links further indicates a campaign to distribute such lures. The ML classifier also flagged this PDF as malicious with high confidence.

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/free-sdcript-executer-for-roblox-game-hack PDF link annotation
    • https://sanjoseelectricians.net/images/roblox-donload-for-free_GM431946152.pdfIn PDF document text
    • https://sanjoseelectricians.net/images/roblox-jailbreak-volt-bike-free-other-game_GM431946152.pdfIn PDF document text
    • https://sanjoseelectricians.net/images/roblox-download-free-ios_GM431946152.pdfIn PDF document text
    • https://sanjoseelectricians.net/images/free-robux-codes-2021-on-iphone_GM431946152.pdfIn PDF document text
    • https://sanjoseelectricians.net/images/dragon-ball-ultimate-roblox-max-stats-hack-2021_GM431946152.pdfIn PDF document text
    • https://sanjoseelectricians.net/images/cheat-in-roblox-dragon-ball-z-final-stand_GM431946152.pdfIn PDF document text
    • https://sanjoseelectricians.net/images/roblox-burd-hack_GM431946152.pdfIn PDF document text
    • https://sanjoseelectricians.net/images/how-to-get-free-robux-100-legit_GM431946152.pdfIn PDF document text
    • https://sanjoseelectricians.net/images/paginas-para-hackear-en-roblox_GM431946152.pdfIn PDF document text
    • https://sanjoseelectricians.net/images/robux-hacks-admin-commands_GM431946152.pdfIn PDF document text
    • https://sanjoseelectricians.net/images/how-to-get-robux-for-free-and-fast_GM431946152.pdfIn PDF document text
    • https://sanjoseelectricians.net/images/free-robux-secret-video-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://sanjoseelectricians.net/images/cheat-engine-on-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://sanjoseelectricians.net/images/free-multiplayer-games-like-roblox_GM431946152.pdfIn PDF document text
    • https://sanjoseelectricians.net/images/how-to-get-free-forgotten-knife-in-assasin-y-roblox_GM431946152.pdfIn PDF document text
    • https://sanjoseelectricians.net/images/free-money-hack-roblox-vicholsimlotor_GM431946152.pdfIn PDF document text
    • https://sanjoseelectricians.net/images/i-got-free-robux-doing-this_GM431946152.pdfIn PDF document text
    • https://sanjoseelectricians.net/images/how-to-hack-roblox-btools_GM431946152.pdfIn PDF document text
    • https://sanjoseelectricians.net/images/free-roblox-script-executor-download_GM431946152.pdfIn PDF document text
    • https://sanjoseelectricians.net/images/free-games-at-roblox-2_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_off00002ead.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EAD 22904 bytes
SHA-256: 3363a65a0e1c15c3a513520e7b3eecfa442522ddaaf4e5d4e9f379edb1e3b1f4
font_01_sfnt_off000061e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61E6 19180 bytes
SHA-256: 0ef6a1cfa1c9f6cf6cc9ad0929a772a7080786e7393e2ec4cf515a91da5a78a6

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