Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3a36b3b62dd796b…

MALICIOUS

PDF

35.1 KB Created: 2021-07-05 19:45:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d392c967c8370360094d5844a832c55b SHA-1: 58f28ca13a29f91e6a1d03cde06c122689ac9e1b SHA-256: f3a36b3b62dd796b489f1e89a8652f718c1cb748db8a99d9758642a8920be64c
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, identified as a link farm, pointing to external sites related to game hacks and cheats. The ML classifier strongly indicates maliciousness, and the presence of a 'download' button lure suggests an attempt to trick users into navigating these links. The primary goal appears to be SEO spam or directing users to potentially malicious content hosted on the linked domains.

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/hacking-egg-roblox-game-hack PDF link annotation
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/coin-master-hack-pc-cheat-engine_GM406889139.pdfIn PDF document text
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/best-way-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/hack-for-robux-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/fairy-world-roblox-hack-pastebin_GM431946152.pdfIn PDF document text
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/pokemon-go-free-808-pokedex_GM1094591345.pdfIn PDF document text
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/free-robux-no-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/roblox-trolling_GM431946152.pdfIn PDF document text
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/free-tiktok-followers-no-human-verification_GM835599320.pdfIn PDF document text
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/are-you-allowed-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/roblox-groups-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/free-coins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/robux-hack-no-survey-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/roblox-buddy-me-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/dragon-ball-rage-cheats-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/how-to-get-robux-hack-that-really-works_GM431946152.pdfIn PDF document text
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/minecraft-windows-10-edition-free_GM479516143.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_off00003310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3310 22532 bytes
SHA-256: 4317321715b5d942614a0f664879b9a7aace4e6314b16ab083fddd49d51bd04c
font_01_sfnt_off00006567.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6567 18592 bytes
SHA-256: 1b1f6c599f7dcdee09b8af7a83d02b9b754dcdcfc9b2b5c4241e5afcc4a2fb21

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