Malicious PDF — malware analysis report

Static analysis result for SHA-256 4de26b70c0489f0c…

MALICIOUS

PDF

43.4 KB Created: 2021-06-03 06:38:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 5509bedb0373c49f9f68ab99cc61a1de SHA-1: 4866a6bfb36d22b9b27d87d51fc5401502408ffb SHA-256: 4de26b70c0489f0cbe804d5975958dc36de3174b666f00d476444a6460ed3445
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 0.9865

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 https://netcdn.online/app/406889139/free-daily-spins-from-coin-master-game-hack PDF link annotation
    • https://duoledesign.com/image/data/files/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/daily-free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/hackear-coin-master_GM406889139.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/free-robux-not-clickbait_GM431946152.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/coin-master-on-facebook_GM406889139.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/coin-master-free-spin-realme-products_GM406889139.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/10-robux_GM431946152.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/download-coin-master-hack-mod-apk_GM406889139.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/hack-xp-net-coin-master_GM406889139.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/coin-master-free-spin-game_GM406889139.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/coin-master-links-to-get-free-spins_GM406889139.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/roblox-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/how-to-get-free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/robux-fun-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
stream_004_off00004ca4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CA4 25596 bytes
SHA-256: e55f31d937c2e54bc78ca669e3d3703587f82ac469d433e6036101f0fbaf6727
font_01_sfnt_off0000862b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x862B 18568 bytes
SHA-256: 83a1403c7ea81f16df60b15bd3ed63af058033cc9f39ccf30f75695a9a8bc87e

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