Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b946655c99062b1…

MALICIOUS

PDF

42.5 KB Created: 2021-05-12 19:06:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 5d944b9afcac87e37ad7752de648cc4f SHA-1: dba012be9256b025701fca855b9be81e74294bf0 SHA-256: 7b946655c99062b18d28af5f0e1d5002a941e00cd4e37afcafe39e69281ba23e
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/coin-master-unlimited-spin-and-coin-hack-game-hack PDF link annotation
    • https://www.knjizara-harfa.rs/files/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/how-to-hack-coin-master-ios-jailbreak_GM406889139.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/roblox-com-hack_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/coin-master-online-hack-generator_GM406889139.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/hack-coin-master-link_GM406889139.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/coin-master-200-spin-link_GM406889139.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/coin-master-hacks-that-work_GM406889139.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/coin-master-free-stuff-links_GM406889139.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/coin-master-game-hack-app_GM406889139.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/roblox-but_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/free-minecraft-skins_GM479516143.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/coin-game_GM406889139.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/free-shirt-templates-roblox_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/pig-master-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/coin-master-hack-version-33-2_GM406889139.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/coin-master-free-spins-facebook_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_003_off00004a5b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A5B 25100 bytes
SHA-256: 08f2442ed9fb24f9bfccd97b815df9f053784765605bdf2b86c369c943e79856
font_01_sfnt_off000082cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82CF 18584 bytes
SHA-256: c8e711e41b973747ec323a47a761701fdaf1f8f6730ed7788ccf1517fe3358ad

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