Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba743c4bf0daaab0…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 14:24:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 1697829cc38df5555dadaa88840db068 SHA-1: 16b27bceac07bf3720e304cb0bd5ca44abc7dcbb SHA-256: ba743c4bf0daaab007b62723b1437916cbaff31a889370276eb92089a0f2dc31
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of SEO-optimized links, many of which point to pages related to game cheats and hacks, indicating a lure for potentially malicious downloads. The presence of an embedded URI and the ML classifier's high confidence score further support its malicious nature. No scripts were extracted, but the document's structure and embedded links suggest it's designed to redirect users to external sites for further compromise.

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/roblox-ban-game-hack PDF link annotation
    • https://fib.ub.ac.id/sac//repository/minecraft-pvp-hacks_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-free-t-shirts-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-robux-wheel_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-hack-iphone_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/it-free-movie-musica-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-cheat-injector_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/instagram-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-50-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-phantom-forces-pepsis-aimbot-hack_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-full-colour-brown-pant-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-spin-link_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/can-you-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-roblox-gift-card-codes-2021-april_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-hacks-for-roblox-games_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/moana-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000321e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x321E 22504 bytes
SHA-256: 4e0039006fb400f9488de2e2cd326097c5a87110613d58ca446d9258b4ecccd8
font_01_sfnt_off00006448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6448 18484 bytes
SHA-256: 9d5f4934e3fc36eeac5b6b5332195d377a7f7204d7b6b5eef7fa0f4bf1a7998e

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