Malicious PDF — malware analysis report

Static analysis result for SHA-256 80e429e19ad152e0…

MALICIOUS

PDF

43.4 KB Created: 2021-06-03 18:33:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 5d9178a3e4c598e18fe2b259ac411739 SHA-1: 2652dedb60785913d94e11f1d1bc24bab7320bc2 SHA-256: 80e429e19ad152e07da13a50b905aee52889978abe1d83ff7f903386af1549c1
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/coin-master-free-attack-hack-game-hack PDF link annotation
    • https://cuc.ac.cr/userfiles/files/coinmaster-spin-ml-link_GM406889139.pdfIn PDF document text
    • https://cuc.ac.cr/userfiles/files/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://cuc.ac.cr/userfiles/files/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • https://cuc.ac.cr/userfiles/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://cuc.ac.cr/userfiles/files/rich-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://cuc.ac.cr/userfiles/files/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://cuc.ac.cr/userfiles/files/free-roblox-injector_GM431946152.pdfIn PDF document text
    • https://cuc.ac.cr/userfiles/files/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • https://cuc.ac.cr/userfiles/files/hack-the-game-coin-master_GM406889139.pdfIn PDF document text
    • https://cuc.ac.cr/userfiles/files/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://cuc.ac.cr/userfiles/files/coin-master-spin-hack-pc_GM406889139.pdfIn PDF document text
    • https://cuc.ac.cr/userfiles/files/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://cuc.ac.cr/userfiles/files/is-roblox-hacked_GM431946152.pdfIn PDF document text
    • https://cuc.ac.cr/userfiles/files/free-roblox-com_GM431946152.pdfIn PDF document text
    • https://cuc.ac.cr/userfiles/files/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://cuc.ac.cr/userfiles/files/roblox-dominus-free_GM431946152.pdfIn PDF document text
    • https://cuc.ac.cr/userfiles/files/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • https://cuc.ac.cr/userfiles/files/is-minecraft-free_GM479516143.pdfIn PDF document text
    • https://cuc.ac.cr/userfiles/files/coin-master-free-cards-link-2021_GM406889139.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
stream_004_off00004f7b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F7B 24940 bytes
SHA-256: b23e37e1ac5952fc4bbecb3fed2134edb40ee51b3f56dbd7ae37e4ac175af279
font_01_sfnt_off00008859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8859 17880 bytes
SHA-256: 64cbdad4b5c3b3a37694725247404ca4617731c1cde232b85c3c0be6b95e7409

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