Malicious PDF — malware analysis report

Static analysis result for SHA-256 06838d23e1e997bd…

MALICIOUS

PDF

42.7 KB Created: 2021-05-15 15:40:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 9e4ec520fa4b2f1ec28d6b2b1cd94c0f SHA-1: e96917c4d6895877e05e853c2aeeda4fea37db36 SHA-256: 06838d23e1e997bd4dc6bb1b67aa1f03e0e8785c2683f0ccb50a6435eb759ab2
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-freebies-2021-game-hack PDF link annotation
    • https://goodtools.tw/upload/files/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/roblox-com-r_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-make-your-own-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://goodtools.tw/upload/files/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/get-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-get-real-robux_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-free-spins-2021-haktuts_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-links-for-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-free-download_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-coin-master-gold-cards_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-free-spin-and-coins-links-home_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-spins-coin-master-site-wwwquoracom_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-spin-hack-without-verification_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_off00004c0e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C0E 25048 bytes
SHA-256: ac74c7ba5434f80e9226a876d3fa4a9f393ecffb72d7d12b69dec484634d5a76
font_01_sfnt_off0000848b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x848B 18272 bytes
SHA-256: 1bcb593477ee65390748ab733566666577cbeb3f4a2efe23a42d3af4bd8bc672

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