Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0ec3bbcfe3f1758…

MALICIOUS

PDF

42.6 KB Created: 2021-05-14 13:18:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: fe0e9b50b760b9a43895349212e7584c SHA-1: 7267a3f61fcad24eee44869c2d56ee7d6a30e6cd SHA-256: b0ec3bbcfe3f17589ef7c0c57741951ef4142e95bb0b4709546abf93dd6dfa53
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by an ML classifier. It uses brand-impersonation credential phishing. 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 5

  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/479516143/chisel-and-bits-mod-pe-game-hack.
  • 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/479516143/chisel-and-bits-mod-pe-game-hack PDF link annotation
    • https://www.nara.org.uk/uploads/files/files/coin-master-hack-online-download_GM406889139.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/get-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/earn-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/haktuts-coin-master_GM406889139.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/free-roblox-followers-generator-2021_GM431946152.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/minecraft-xray-hack_GM479516143.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/how-you-get-robux_GM431946152.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/free-spin-coin-master-today_GM406889139.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/do-you-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/coin-master-free-daily-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/how-to-get-free-robux-fast_GM431946152.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_off00004de7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DE7 24364 bytes
SHA-256: 772fedd9a50e7f455ffc85cf575edd56fb68021697477456bffff71ab0671250
font_01_sfnt_off000084aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84AA 18268 bytes
SHA-256: 21600419038eacf8d17a25e0de8b2d3f701338884b0b037dc932f5efdb40593c

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