Malicious PDF — malware analysis report

Static analysis result for SHA-256 a079cfea41da4777…

MALICIOUS

PDF

46.7 KB Created: 2021-05-10 15:07:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: bd1e38d276f92a7b8a5bd0b90f4633ce SHA-1: 1afb5b1a5d69b426d7e19b30a5c5d019356b6847 SHA-256: a079cfea41da47777d7513825c7ca4cdc64ccb8fbd19f8805de9201cba2898b1
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 0.8958

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-cheat-codes-game-hack PDF link annotation
    • https://bwsrubber.com/image/data/files/minecraft-realms-free-codes_GM479516143.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/roblox-script-executor-free_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/robux-link_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/free-robux-now_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/coin-master-link-app_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/free-coin-spin-daily-link-net_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/coin-master-hack-download_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/coin-master-daily-free-coins-link-today_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/boku-no-roblox-hack_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/coin-master-free-daily-spins-2021_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/how-to-make-a-minecraft-java-server-for-free_GM479516143.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/free-coin-master-cheats_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/apps-to-get-free-robux_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_003_off00004709.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4709 27188 bytes
SHA-256: 972915acfb57ca36924d91cc8f470345e888f9e2ba4ca4381d1d79b22513ba8e
font_01_sfnt_off00008366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8366 7332 bytes
SHA-256: d811e0aca85f3b94c42cd1240eec68b8eb378f3d8be5e408d3f6abd0f11f834d
font_02_sfnt_off0000957f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x957F 17884 bytes
SHA-256: 9ccd68c54c009ea11d55f1e27d33615aaba425727d3c9dac5b634b519021a5b7

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