Malicious PDF — malware analysis report

Static analysis result for SHA-256 4168c95ed035d272…

MALICIOUS

PDF

47.8 KB Created: 2021-06-03 16:16:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 843a1becf8d05f2613dfd0f1821f3ce0 SHA-1: d567b37599d83a47a6c85a48cafb916707de0829 SHA-256: 4168c95ed035d27205268f5669d5516c010085580b254a4fbe88cf49fd5453e3
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 0.9769

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-coin-master-spins-2021-game-hack PDF link annotation
    • https://www.andrology.co.uk/uploads/files/files/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/minecraft-pe_GM479516143.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/app-master_GM406889139.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/how-to-download-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/roblox-premium-free_GM431946152.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/coin-master-ios-gods-hack_GM406889139.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/sites-for-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/free-minecraft-videos_GM479516143.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/how-to-get-roblox-hacked-account-back_GM431946152.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/how-to-get-free-tiktok-followers-without-verification_GM835599320.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/how-to-get-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/tiktok-like-bot-free_GM835599320.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/earn-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005209.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5209 26328 bytes
SHA-256: 118a3e5c58742d513953e74ffa62982838aeb42dd0c593a394066df3160b4e2f
font_01_sfnt_off00008e16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E16 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00009801.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9801 18288 bytes
SHA-256: cbf21fc5c11f74798808ab0cc71af5e4bf323ced5a050f8983f0748b8c809d88