Malicious PDF — malware analysis report

Static analysis result for SHA-256 052e233d67d1569a…

MALICIOUS

PDF

44.8 KB Created: 2021-05-16 22:32:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: b75ce986fa32c3d39919515ce5888cbc SHA-1: d8bf6dc95996569ab37da804b9defae2e9def311 SHA-256: 052e233d67d1569a51844402957ed0d8cd33799d17ee9a51609a013720b7aaee
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, 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 0.9980

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/how-to-get-free-robux-codes-game-hack PDF link annotation
    • https://asiavisiontreks.com/userfiles/files/get-more-robux_GM431946152.pdfIn PDF document text
    • https://asiavisiontreks.com/userfiles/files/hack-para-coin-master-sin-verification_GM406889139.pdfIn PDF document text
    • https://asiavisiontreks.com/userfiles/files/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • https://asiavisiontreks.com/userfiles/files/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://asiavisiontreks.com/userfiles/files/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • https://asiavisiontreks.com/userfiles/files/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • https://asiavisiontreks.com/userfiles/files/hack-to-send-gold-cards-on-coin-master_GM406889139.pdfIn PDF document text
    • https://asiavisiontreks.com/userfiles/files/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://asiavisiontreks.com/userfiles/files/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • https://asiavisiontreks.com/userfiles/files/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • https://asiavisiontreks.com/userfiles/files/coin-master-hack-app-for-iphone_GM406889139.pdfIn PDF document text
    • https://asiavisiontreks.com/userfiles/files/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • https://asiavisiontreks.com/userfiles/files/robux-generator-that-works_GM431946152.pdfIn PDF document text
    • https://asiavisiontreks.com/userfiles/files/wurst-client-112-2_GM479516143.pdfIn PDF document text
    • https://asiavisiontreks.com/userfiles/files/hack-version-of-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • https://asiavisiontreks.com/userfiles/files/free-roblox-gift-card-codes-2021-unused_GM431946152.pdfIn PDF document text
    • https://asiavisiontreks.com/userfiles/files/free-roblox-adopt-me-accounts_GM431946152.pdfIn PDF document text
    • https://asiavisiontreks.com/userfiles/files/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • https://asiavisiontreks.com/userfiles/files/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • https://asiavisiontreks.com/userfiles/files/how-to-earn-robux-for-free-2021_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
font_00_sfnt_off00004989.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4989 30612 bytes
SHA-256: 15e5097a6f6f040e1215f54ea8298dc18d73af6789bebb905f657cc3ed79c4df
font_01_sfnt_off00008c4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C4F 18456 bytes
SHA-256: 647704a1f8ac96c456e26df3796ee2ada4959e42324ca69004a5f2968b1e2bf7

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