Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a31615234b30530…

MALICIOUS

PDF

35.4 KB Created: 2021-06-20 05:02:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 7576150c9c2665fd7677aa5bc9d00f1d SHA-1: 9e92c579c295413bc0ed1f9d6db286ce52dbd2b3 SHA-256: 4a31615234b30530e1fb4553a5bad44f694faa16bd6cb08687128524ba653c84
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded URLs that lead to known malicious redirector infrastructure, specifically http://netcdn.co/app/431946152/jojo's-bizarre-adventure-roblox-hack-game-hack. The document body and numerous URLs suggest a lure for game cheats or hacks, likely to download further malware. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/jojo In PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/amon-magi-roblox-free_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/coin-master-apk_GM406889139.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/all-apocalypse-rising-cheats-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/earn-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/coin-master-hack-for-android_GM406889139.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/free-minecraft-skins-java_GM479516143.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/coin-master-free-spin-and-coin-link-haktuts-hacking-news_GM406889139.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/free-robux-eoblox-fiddler_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/how-to-get-free-robux-items_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/roblox-cheats-for-money-2021_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/how-to-hack-roblox-accounts-passwords_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/cheat-roblox-pour-acheter-des-gamepass-gratuitement_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/free-roblox-accounts-with-robux-that-work-not-banned-2021_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_off0000312a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x312A 22440 bytes
SHA-256: 366f658a52fa37c9d767af161dea46c17632dabf0c74d8dd0c014cf5152206e6
font_01_sfnt_off00006319.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6319 19808 bytes
SHA-256: 3ecffe502cc190ff3f3cd198c0d204323f9dc564fa34bd75205ad7cfd7c58187

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