Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b63afab96d28537…

MALICIOUS

PDF

45.3 KB Created: 2021-06-03 23:59:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 5630a9d9446fb2740e306634a84d6ffd SHA-1: a90f2c4b7c4a2f2f3bc57ffb751963ef1cd1b003 SHA-256: 6b63afab96d285375c09ee28b513c22aaf1d1597d13248fe8f823b2f2356e878
182 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 0.9864

Heuristics 6

  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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.online/app/431946152/free-robux-accounts-game-hack PDF link annotation
    • http://perpus.unpam.ac.id/repository/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/robux-online_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/minecraft-dungeons-download-free_GM479516143.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/how-to-get-free-admin-in-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/roblox-arsenal-hacks-download_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/how-to-hack-coin-master-game-without-root_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-official-page_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/como-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/earn-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-hack-2021-no-survey_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-robux-please_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • https://direct-link.netIn PDF document text
    • https://www.bandicam.comIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051c6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51C6 26524 bytes
SHA-256: 3f54cae3e879ac802fe31c5da6727e0a9f27830cc2fd99079c91436eab44a521
font_01_sfnt_off00008f34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F34 18120 bytes
SHA-256: ef72730342a71d63428e939ae8b3e53b657bfaebcd113dd5195284c27a8ef9c4

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