Malicious PDF — malware analysis report

Static analysis result for SHA-256 814b21a4820a8d1b…

MALICIOUS

PDF

35.1 KB Created: 2021-07-03 12:05:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0337dc3ecdfc88ba4ff91d45919466c7 SHA-1: 32bcfddf78eb986ca1ce56eee37c879d62259029 SHA-256: 814b21a4820a8d1bcb9461b1b6cdf72d34734256c76ef41a94ac171b22020db4
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/free-spins-on-coin-master-links-2021-game-hack PDF link annotation
    • https://library.itn.ac.id/perpusitn/repository/free-robux-disvord_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/hacks-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-coins-coin-master-iphone_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-free-items-hack-pastebin_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-to-get-free-robux-no-scamcom_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-robux-hack-tool_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/unlimited-robux-2021_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-cheat-codes-xbox-one_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/robux-hack-2021-december_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/earn-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/wie-kann-man-bei-roblox-hacken_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/hack-coin-master-spin-apk_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/hack-de-robux-100-real_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-admin-robux_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/secret-robux-hack-revealed_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-free-draw-tutorial_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_off000031a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31A2 22880 bytes
SHA-256: 6e8b2fc1c473a6f8dc217d6c339937cc8e65ef3ec6e21c25f9f68413d1b1984a
font_01_sfnt_off00006520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6520 18748 bytes
SHA-256: 172d7edc7b704133c11c250e037ef23dd19261bcf2198edae7c01912c23da7d1

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