Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4f73f4ca4cec4b7…

MALICIOUS

PDF

43.7 KB Created: 2021-05-16 13:09:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 02aaef53a27e772e6b58fd4784177ec9 SHA-1: ec0e2d30f265b3f5cd318e10a9214fa48ab64ab3 SHA-256: d4f73f4ca4cec4b780a34a4cbc1b076d8ede0f9c2052a4a8a92709de4545a3ba
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 0.9969

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/431946152/roblox-rape-hack-game-hack PDF link annotation
    • https://www.atrax.hr/files/minecraft-bedrock-edition-pc-free_GM479516143.pdfIn PDF document text
    • https://www.atrax.hr/files/roblox-hax_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • https://www.atrax.hr/files/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.atrax.hr/files/coin-master-connection-lost_GM406889139.pdfIn PDF document text
    • https://www.atrax.hr/files/freespincoin-masterlinkdownload_GM406889139.pdfIn PDF document text
    • https://www.atrax.hr/files/hack-coin-master-apk-mod_GM406889139.pdfIn PDF document text
    • http://atrax.hr/files/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/mcpe-hack-client_GM479516143.pdfIn PDF document text
    • http://atrax.hr/files/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/can-i-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.atrax.hr/files/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/coin-master-hack-unlimited-spins-apk-download_GM406889139.pdfIn PDF document text
    • https://www.atrax.hr/files/coin-master-blogspot-links_GM406889139.pdfIn PDF document text
    • https://www.atrax.hr/files/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://atrax.hr/files/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/free-roblox-templates_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://atrax.hr/files/coin-master-free-spins-whatsapp-link_GM406889139.pdfIn PDF document text
    • https://www.atrax.hr/files/master-coin-free-spin_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_off00004b71.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B71 26500 bytes
SHA-256: b32537b343110f9501c4a770ac76f6a921a3854f650fc7f43bf513ca8ec3fa3f
font_01_sfnt_off00008818.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8818 18356 bytes
SHA-256: 8a1fe0c7231104fca4fa627868bae52978e90e92fc8d209bfe3611444447d27b

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