Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fdefced0f34e3b0…

MALICIOUS

PDF

33.3 KB Created: 2021-07-05 13:57:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 99b7262598a9e91ce9b73f6ea7c5f682 SHA-1: 507665170315b5f58315fc6707b7c9778ae742e8 SHA-256: 0fdefced0f34e3b052c93ddf6c01d4b9ae38d712a77f87a8a56da803517f36a0
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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/free-roblox-clothes-templates-game-hack PDF link annotation
    • http://digilib.ulm.ac.id/pusat/repository/minecraft-bedrock-free-download-pc_GM479516143.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-giver-2021_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/secret-skin-combination-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-site-2021_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-roblox-bot-accounts_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-run-lua-script-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/robux-com-free_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-roblox-hoodie-template_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-adopt-me-hacks-2021_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-get-800-robux-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-get-games-for-free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/cheat-codes-build-a-boat-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-hack-script-vehicle-simulator-infinite-money-script-free_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-do-you-get-free-robux-no-hack_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-hack-apk-35-33_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-co_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/hacked-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-minecraft-pe-server_GM479516143.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-2021-robux_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_off00002cfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CFB 21480 bytes
SHA-256: f8121d170429d1b91d475bcf96e709107270c00012198e2170afce589480c1d9
font_01_sfnt_off00005c0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C0C 19356 bytes
SHA-256: ed8afa3911abce236b162dddd308dc518612872d30365d77fdf77b284c1332f6

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