Malicious PDF — malware analysis report

Static analysis result for SHA-256 a520a213cf03f94f…

MALICIOUS

PDF

47.5 KB Created: 2021-05-15 13:53:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e1b5ada3d825df943e85a182b53dd62f SHA-1: 859c5ae2720b1d7fd1e903ae8305297c310b97f8 SHA-256: a520a213cf03f94fd269e3c470fd563941f0ceabf16e54e148e85bd90479e0e3
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links designed to lure users with promises of game hacks and free spins, a common social engineering tactic. The primary URL leads to a 'coin master free spins link no verification' lure, and the PDF itself functions as a link farm pointing to similar scam-related PDFs. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to malicious or scam websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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/406889139/coin-master-free-spins-link-no-verification-2021-game-hack PDF link annotation
    • http://www.teapotjewelry.com/images/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.teapotjewelry.com/images/coin-master-hack-injection_GM406889139.pdfIn PDF document text
    • http://www.teapotjewelry.com/images/coin-master-hack-without-human-verification-india_GM406889139.pdfIn PDF document text
    • http://www.teapotjewelry.com/images/mcpe-master-hack-unlimited-coins-latest-version_GM406889139.pdfIn PDF document text
    • http://www.teapotjewelry.com/images/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • http://www.teapotjewelry.com/images/download-coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://www.teapotjewelry.com/images/minecraft-free_GM479516143.pdfIn PDF document text
    • http://www.teapotjewelry.com/images/coin-master-cards-for-free_GM406889139.pdfIn PDF document text
    • http://www.teapotjewelry.com/images/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://www.teapotjewelry.com/images/free-minecraft-svg-cutting-files_GM479516143.pdfIn PDF document text
    • http://www.teapotjewelry.com/images/coin-master-spin-hack-link_GM406889139.pdfIn PDF document text
    • http://www.teapotjewelry.com/images/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • http://www.teapotjewelry.com/images/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://www.teapotjewelry.com/images/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://www.teapotjewelry.com/images/coin-master-hack-online-cheat_GM406889139.pdfIn PDF document text
    • http://www.teapotjewelry.com/images/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://www.teapotjewelry.com/images/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
    • http://www.teapotjewelry.com/images/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://www.teapotjewelry.com/images/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.teapotjewelry.com/images/free-robux-no-email_GM431946152.pdfIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004f8f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F8F 26508 bytes
SHA-256: 2e67aacfc2af330ef192a804a21efedba7a110c2bb9b0980552cd51632363288
font_01_sfnt_off00008c42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C42 2944 bytes
SHA-256: e8dca988325d5b5adea380508eed68725fcb814536e93cd420f224b7166adc23
font_02_sfnt_off0000966d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x966D 18592 bytes
SHA-256: f74899e085c91cd53f5ca09b8a5278408f496fc0c0b246b6d10c1aa0f6296d24

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