Malicious PDF — malware analysis report

Static analysis result for SHA-256 7850b29077eacd2f…

MALICIOUS

PDF

40.8 KB Created: 2021-05-13 20:18:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 973196d120fb4d62950f638e2bb8cc87 SHA-1: 77921b9e64ca6e16e0841201a16e0408c370b658 SHA-256: 7850b29077eacd2f34260a4c729399ffb5173b8680adafb989290235a6217868
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 0.9971

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.xyz/app/406889139/free-spins-coin-master-april-2021-game-hack PDF link annotation
    • https://www.knjizara-harfa.rs/files/free-spins-on-coin-masters_GM406889139.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/how-to-get-free-pets-in-adopt-me-roblox_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/coin-master-unlimited-spin-and-coin-hack_GM406889139.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/game-toolbox_GM479516143.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/best-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/real-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/minecraft-free-download-ipad_GM479516143.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/hacks-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/hack-de-coin-master_GM406889139.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/blox-best-robux_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/how-to-get-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/spins-gratis-coin-master-hoy_GM406889139.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/coin-master-game-free-spin_GM406889139.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_003_off000045c4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x45C4 24456 bytes
SHA-256: 9eb832285eed3f9fd9749b72bfa0fc034904ce87bd2655fe5251f942f69093c1
font_01_sfnt_off00007ce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CE9 18360 bytes
SHA-256: 1b3ee1f783a077a1595d8149d2d089b96120ec8e3b888397002dff6814e01a54

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