Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c5c82430d95433e…

MALICIOUS

PDF

34.9 KB Created: 2021-07-07 19:06:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 8f548a364d96efb30502af5d5bfa53a5 SHA-1: 8c27ecce69722b235eefbc6f72bc4ce1c2ba9ff4 SHA-256: 2c5c82430d95433e65ce36d7953066b8e6f3796912a42b7aa49f120633e5d2c9
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/static-moonactive-net-rewards-game-hack PDF link annotation
    • https://www.knjizara-harfa.rs/files/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/all-black-roblox-free_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/how-to-hack-a-password-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/roblox-games-for-free-no-download_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/free-star-wars-clothes-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/how-to-make-your-own-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/top-5-juego-hackeado-roblox_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/how-to-get-free-robux-no-bc_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/roblox-tycoon-hack_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/roblox-hacks-com_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/roblox-wiki-free-robux_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/roblox-hack-no-survey-no-download-2021_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/money-hack-sur-sunset-city-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/moon-active-games_GM406889139.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/how-to-get-100-free-spins-on-coin-master_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_002_off0000332d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x332D 22552 bytes
SHA-256: a87c365327614541e3b1e94749fd1360a2eb5f1f998392db54bb4694db1a4346
font_01_sfnt_off0000656a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x656A 18284 bytes
SHA-256: b288d9ef267feb3cee4f7351aa4425256813d44ff173698cd9488028fdb93443

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