Malicious PDF — malware analysis report

Static analysis result for SHA-256 21303c735fd31621…

MALICIOUS

PDF

34.2 KB Created: 2021-07-04 13:41:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 3991e6fde83c3b0d871cdb80af75815f SHA-1: 9057506b66ef380ec09ee33c8c7677287cbe629e SHA-256: 21303c735fd31621e88ce5ca03e9cfd3df77c5b08b74425e81f88c7a530fc673
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/406889139/coin-master-hack-tool-game-hack PDF link annotation
    • http://www.vetmed.fkh.unair.ac.id/repository/how-to-change-your-name-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/free-hair-roblox_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/coin-master-free-spins-no-generator_GM406889139.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/cm-spin-link_GM406889139.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/roblox-hack_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/roblox-cheat-codes-jailbreak_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/pokemon-go-free-coins-2021_GM1094591345.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/promocodes-free-robux_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/how-to-change-roblox-name-for-free_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/minecraft-windows-10-edition-free-download_GM479516143.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/how-to-hack-coin-master-game-2021_GM406889139.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/www-robux_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/how-to-get-the-hacker-egg-roblox_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/muscle-simulater-roblox-cheat-codes_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/good-free-t-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/daily-coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/roblox-bubble-gum-unlimited-candy-hack_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_off00002ffe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FFE 23036 bytes
SHA-256: e5a6d7c44dd3a7f2d90d52888b6566a48e1e9e61fe7691ab5124aa32421aedd9
font_01_sfnt_off000063a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A7 18080 bytes
SHA-256: d73e4cba5eae4963415d942f6085a7e87ee20f191a57df75a2e3d628f5bdbb21

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