Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7e9f932a48f2a1a…

MALICIOUS

PDF

47.9 KB Created: 2021-06-08 11:30:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 83541c686e27e40563c589c583ce85b4 SHA-1: 32b7517ca4714a80778f6595dcf389d6cffcfa54 SHA-256: e7e9f932a48f2a1a23a7c39becbaec4e6e150278a693d97dfd0ec1ff35f682e7
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document exhibits characteristics of a malicious lure, employing a link farm of SEO-optimized PDFs to direct users to potentially harmful content. The primary URL and numerous linked PDFs suggest an attempt to trick users into downloading malware or visiting malicious sites under the guise of game hacks or free resources. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.tw/app/431946152/bee-swarm-simulator-roblox-hack-game-hack PDF link annotation
    • http://opac.salatigakota.go.id/slims7/repository/games-on-roblox-where-you-win-a-free-rixe_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/new-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/how-do-you-get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/coin-and-spin_GM406889139.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/is-minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/how-to-hack-a-person-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/roblox-skins-boy-free_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/aristois-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/tiktok-free-update_GM835599320.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005083.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5083 26476 bytes
SHA-256: 5ecb6c41950317a4fa381992930a2921b863d3aa94280b3311b626b427f7cced
font_01_sfnt_off00008c67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C67 2940 bytes
SHA-256: eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a
font_02_sfnt_off00009676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9676 18968 bytes
SHA-256: 84bb72defce008412033c4781ec1fcca48ee0cc6c984865515b5d3a766c66b30

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